Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7edecd1b5712be…

MALICIOUS

PDF

70.1 KB Created: 2021-02-21 21:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0defb8dc195ff802964756d05b0f4325 SHA-1: bc5f3534a045a38cd674272c10960fc8c4f4e003 SHA-256: 1f7edecd1b5712bed4b2a1c77ffd85cd05fb420c5365b05c663a46f6e7816a1c
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains a large number of external links, many of which point to SEO-optimized PDF files, suggesting a link farm or redirector strategy. The primary URL, https://seumenha.ru/strik?utm_term=can+you+get+procreate+on+ipad+air+2019, is likely a redirector to a malicious site.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/strik?utm_term=can+you+get+procreate+on+ipad+air+2019 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371269/normal_5ff75936da3fe.pdfIn PDF document text
    • https://birijejukuz.weebly.com/uploads/1/3/5/3/135386669/6140513.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/wajugibi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_600d7881e355c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384295/normal_600dc3955ff8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476127/normal_602ac6b95fec6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454170/normal_5fe8dc4de55ba.pdfIn PDF document text
    • https://sumomaduge.weebly.com/uploads/1/3/4/8/134884200/bulajikipewodawodaso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380403/normal_5ffc56fc730d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465269/normal_5ff38b86d6a63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374532/normal_600272cae7b03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452395/normal_600f2e3de5524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478414/normal_602d432e3d096.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/muvazi/sony_dsc_rx100_mark_7_review.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/58467867757.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/citizen_eco_drive_manual_8700.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/3dmark_11_advanced_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/87828544832.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/astro_a40_tr_mixamp_guide.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_off0000c9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EE 5520 bytes
SHA-256: 6c3361aa2e0994b9c59262dff77ce10096f32c66e74b0caa5c0e6d6369cbf0ae
font_01_sfnt_off0000dcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD3 14440 bytes
SHA-256: 99d3b071f5153c9de037809d0a890872d5a1d3d0e3ba90ebb42389aa2c637eba

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