Malicious PDF — malware analysis report

Static analysis result for SHA-256 62cb18678d968f5b…

MALICIOUS

PDF

74.3 KB Created: 2021-03-08 20:34:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 06cf6766921dc6e45023bb98c6020f60 SHA-1: 9df16fdba0c97e91d31d0a3f2e81075617a3186d SHA-256: 62cb18678d968f5b15bdb10df15d7ba763f794542c1e8dea16059bcd8541c9fe
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/aws?utm_term=applied+statistics+and+probability+for+engineers+6th+edition+pdf+solution+manual PDF link annotation
    • https://lisoletabe.weebly.com/uploads/1/3/4/5/134511207/baronumituba-jenov-lagisijise-zofaselodos.pdfIn PDF document text
    • https://malodarugamizo.weebly.com/uploads/1/3/4/8/134853004/90896989e33c99.pdfIn PDF document text
    • http://vizit.store/3261385234tocvs.pdfIn PDF document text
    • https://finukapaxareb.weebly.com/uploads/1/3/4/4/134494590/tupimolukutoxeno.pdfIn PDF document text
    • https://simebusuf.weebly.com/uploads/1/3/1/4/131406507/susevefu.pdfIn PDF document text
    • http://upsbox.ru/42654134639t3aq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/bahubali_naa_songs_1.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/manujitiji.pdfIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_906506ccdd934b558a9efff196b99dd0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luborinizu/71714833274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51151549-fef0-46e6-890c-8e3ad63403df/23406174784.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/60314878110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/339e5ab6-5655-46de-837c-398f0229dc8c/vasovubimozigefupu.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/cape_town_weather_7_day_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae27ec36-e5ce-4ef0-9079-7caa62507675/45828965785.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/pizikibosefusukebumefa.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/what_does_the_picture_of_the_divine_mercy_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7a56e2-e812-4bda-9a44-b42a2c57bf3c/12358669995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9fbd22f-f8ba-4ab6-a203-890debba0419/biwisugudewamidinuf.pdfIn PDF document text
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_596b809d08ef4abb83db60ac9609fce6.pdf?index=trueIn 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_off0000e286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE286 5956 bytes
SHA-256: 2f4fc23eceb359eb58bf4095d2fe38378f3f087b1607914fbe46cc967854595a
font_01_sfnt_off0000f6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AC 10884 bytes
SHA-256: 4243e1efcb5c7ed2ce01935801748f21b534dfce717a153f3b1c71d174143329

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