Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d100bb216c8a7b…

MALICIOUS

PDF

83.9 KB Created: 2021-09-21 16:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7152263f82ac92fc5ac4b81c12ec7ec9 SHA-1: b093f6cdf7387a01c92445cefa08bb80a1b0cd96 SHA-256: e2d100bb216c8a7b4fe2a6d0f994e892cad34a871afb03143fd4c554907f4513
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for Pdf.Phishing.Trojan. The numerous embedded URLs and link farm indicators suggest the document's primary purpose is to redirect users to external, potentially malicious websites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://cructi.ru/uplcv?utm_term=how+to+cast+on+mi+tv+stick PDF link annotation
    • http://tieulongcopro.com/luutru/files/97892061157.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16140e2e96f94d---31562187505.pdfIn PDF document text
    • http://sibaco.ru/ckfinder/userfiles/files/9649430038.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/wepufug.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/giguvimamekajibugazum.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/tupopasoz.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d16693b344---mefebovad.pdfIn PDF document text
    • https://nadrozmerne-sklo.cz/uploads/75659350947.pdfIn PDF document text
    • http://www.slenderclub.cz/ckfinder/userfiles/files/kavakuke.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/49618576285.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16137766333a87---tizewuwuvuxafulurilet.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/74826738579.pdfIn PDF document text
    • http://smsgurugram.com/miet/assets/files/37746757628.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/luwimefud.pdfPDF link annotation
    • http://dulichtantai.com/files/uploaded/files/komozo.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/24722678970.pdfIn PDF document text
    • https://simbhaolipower.com/images/file/luriko.pdfIn PDF document text
    • http://imi.vc/upload/files/71295250523.pdfIn PDF document text
    • https://pgprojekt.pl/Upload/file/zusijusivuziberewef.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/31027a9fbd5beb97084c8feae16d47bc/pidoradutapetazonawa.pdfIn PDF document text
    • http://risme.vn/files/59529542812.pdfIn PDF document text
    • https://sikahaiphong.com/images/news/files/mewiwajifurizenovokalid.pdfIn PDF document text
    • http://intertermo.nl/userfiles/file/19116975198.pdfIn PDF document text
    • http://fizjoactiv.eu/Upload/file/pesoposukoka.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/kenakafunoxarajikipazi.pdfIn PDF document text
    • 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_off0000e3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FF 10348 bytes
SHA-256: 361043fba857a53e6eee32327b6db62542708fed463b657dd6867a3d38cb83e0
font_01_sfnt_off0000fb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001136f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136F 18316 bytes
SHA-256: cf6fb61cc6ea5fd344fe06b8bc03c1073e2dd7b69d34a8755a811975d7cc2c2a

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