Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec6bcda4c836135…

MALICIOUS

PDF

86.7 KB Created: 2021-07-16 13:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f719a3b5a66eb079cb28edf7cb32474c SHA-1: 57b8e07bce9902332c5d35d114cb1faebad662d9 SHA-256: 8ec6bcda4c8361352bf88caba45cb74dd9950e8ef6ae4a5ebb7821fa80edbe81
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on compromised websites, likely serving as a lure for users to download further malicious content. The document body is heavily obfuscated and unreadable, preventing a deeper analysis of its specific content, but the heuristic firings strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/c5c68461c566b1e0104c6fd1fdd32ae1/xugakonudomelawimopivel.pdf In PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/7a522fd01b07f65fd8efbb22f1c98eab/zigaduxisusosowasagu.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210611_2F0B98167298977E.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/7d26c1ce0d3bbf82a4a1220e9ec80db8/javika.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609219408b2df---8293203468.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/sabuvobedilof.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/87e25759c87ec41305436e8e9f5055f5/93994521305.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/3a4b9a46ba669bceb5a85b27bcfc4577/voverozavak.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/38dfc71b932d95d76615b218e8204849/36487462774.pdfIn PDF document text
    • https://anfauglir.com/images/file/17081637498.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9cc40d616---35475193413.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/d142f317ddccbe4cfa68a0117ad931a5/ranita.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/dapoteworotez.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/b16725b518debc952597f35e03bc6b87/50429060426.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/nusevaxezaledawinelarelo.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/nukegupofawazedamim.pdfIn PDF document text
    • http://azizavacanze.com/userfiles/files/95023429881.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/389319969.pdfIn PDF document text
    • http://alphaconsultinggroup.us/vpw/images/file/8020850647.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cbba7b820dc---tijesilotepa.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/5d8f38955f85555686f879e457c9a91d/wixuxupolu.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/e692a4fdcb9b78911eb3b491fc91afa3/najosopafel.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/busovipokidajo.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210523193126.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/jokawawobanavelebukodarew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=yesterday%27s+3+digit+lottery+numberPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A4 11136 bytes
SHA-256: d079b0844f141d3cf06e623e35aea9485cb3a47ea632e6c32c29f5fef0c05a69
font_02_sfnt_off00011c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7C 18312 bytes
SHA-256: 0b315b4d32bf585058f48e9120b9b3ae7f593064cf79b1cbd7e405b62d934c0e

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