Malicious PDF — malware analysis report

Static analysis result for SHA-256 5370560eef843dcc…

MALICIOUS

PDF

78.6 KB Created: 2021-06-14 14:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0d1850994bcea9813275602841afc9ac SHA-1: 578ec3e0493789bdc1af87b472a69032d75c528b SHA-256: 5370560eef843dcc685a273649fc316f7147970fbeee2c626c2aa30061aed2f4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to external websites, many of which appear to be compromised or disposable hosting. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure for downloading MP3 files, which could be a pretext for delivering a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=saraswati+chalisa+mp3+download PDF link annotation
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/7bvl8efsmdmq7o4frrokqtv7kj/20186004094.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160809ccf1e76a---bozoxenorodapesepala.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210531_44871942A945765F.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794e105272a---55490799177.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fc0aeff33---tavepunaxefumalewivesu.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/a5ef4478c0c9e1ec6f1fb071c90f274c/32441264344.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/h02krku58ctqvonc5iq43jc14v/nowufulejikoled.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/mesaxonidaxixir.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/gilareserake.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160948fc524584---53174469798.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/95991097711.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb70243dad9---sumedunusosuxokukulobire.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/g9ll06d1fq49uil5j78d295b9a/xabariruzifinoxaxumiwe.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/givebasatikesasix.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/99d2bf32b18fb3461018a2cac674a947/77066413492.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/89879442895.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/vokezunumojapivojeduk.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b6e9c53fd---bawosatofowizevokotatej.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/buwijosuzozejukorejemok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF356 5672 bytes
SHA-256: a99ad7c3be355d115dba8589b2a3f6b6d791097b490c05e58af14fc15d772e77
font_01_sfnt_off0001068b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068B 11440 bytes
SHA-256: 7032207c9cbef59c6c0f8a81cd0646257d6a00868c67cc08fa2ccd3385e3d8a1

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