Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f2f4398bbfcfb8…

MALICIOUS

PDF

70.2 KB Created: 2020-12-02 19:18:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: eaba65417be8e76f12c40bf86eca198e SHA-1: 9d822f54903c13e79675151c513f163e10dc6463 SHA-256: 39f2f4398bbfcfb8b104a7a9009bc914de55aeff4f296ba744757a019ae1deb0
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic firing for 'PDF_SEO_LINK_FARM'. One of the embedded URIs, 'https://traffnew.ru/aws?utm_term=purevpn+apk+ios', suggests a potential phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffnew.ru/aws?utm_term=purevpn+apk+ios PDF link annotation
    • https://kafuribawixunav.weebly.com/uploads/1/3/4/8/134897544/tixomaj-fujeg-ladivolomirojol-dibofokekuzifuv.pdfIn PDF document text
    • https://pumutetigowon.weebly.com/uploads/1/3/4/6/134699291/pujetarajubasufig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403143/normal_5f95000be4d18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416932/normal_5fa6ee2fd91ce.pdfIn PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/tivosurov-bujaduradumuv-tidonis.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/pidufozu/manual_transmission_shift_levers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf9365147b14804f8970c/1606285622567/81576208859.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/maxazabamaweme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fffafe42-6542-4267-9a1f-956cf4d3e920/5864434749.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf48f3145a8629dca706a5/1606371572223/fiverr_conversion.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/61713251917.pdfIn PDF document text
    • https://s3.amazonaws.com/sodoxi/22185298003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/832e074f-f6b1-4ffa-a9af-fbb3d526ec2c/vosodefedida.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4E 4908 bytes
SHA-256: 4d47b0dd8a092cc011b663e70e2ee1004016c168a8a70351454b4ec08592cd63
font_01_sfnt_off0000dd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD14 17484 bytes
SHA-256: 30414b455409e863f9781f95c83f6ddc5394fd03511e365e4ed747c98043879f

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