Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabaf389aece6c6c…

MALICIOUS

PDF

74.5 KB Created: 2021-04-25 16:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f4017f07217bc4d8297563b7797bc8ee SHA-1: 39be8df3dfd431e48e9e0fcdcb7b45702b085679 SHA-256: eabaf389aece6c6c9fa9fc95776a99e108aaf14d8d296715f7e6a2a85fa0f9ca
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to what appears to be a link farm designed for SEO manipulation, with one prominent link leading to a redirector. The document body, though heavily obfuscated, suggests a lure related to 'day trading'. The presence of ClamAV detection and ML classification strongly indicates malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/strik?utm_term=how+to+find+stock+for+day+trading PDF link annotation
    • https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/3641345.pdfIn PDF document text
    • https://vuderuxedus.weebly.com/uploads/1/3/4/6/134692959/1ab28d0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384307/normal_601572256a70c.pdfIn PDF document text
    • http://manamuposa.getenjoyment.net/81698115659.pdfIn PDF document text
    • https://siluxukazikuwo.weebly.com/uploads/1/3/5/3/135326211/vasoletumirob_wafoz_gifakuxafoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448718/normal_6016f54f2655b.pdfIn PDF document text
    • https://dunudafulu.weebly.com/uploads/1/3/1/0/131071166/6036675.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415974/normal_5ff411b78da47.pdfIn PDF document text
    • https://dugigoje.weebly.com/uploads/1/3/4/7/134754128/molutidikoz_kudarakolo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_ec471a0244da4cd683aaa25978552bee.pdf?index=trueIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_4dff1a01d4c74d6981eb042316b2acc0.pdf?index=trueIn PDF document text
    • https://69669160-cc20-42a3-bfef-e1e1fd1f8163.filesusr.com/ugd/8094a4_8428efbd245f43898eb4d5a316117347.pdf?index=trueIn PDF document text
    • https://5f90d536-2a72-4461-adff-280afd3056cb.filesusr.com/ugd/27c394_a8df632f45d14b4ba8e11f8c7f3dca27.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/bollywood_hit_audio_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/burger_king_coupons_2019_oktober.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/2220898328.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/what_does_sunshine_in_my_pocket.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/biology_template_for_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/76230560949.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/55487509290.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/32816172639.pdfIn PDF document text
    • http://rawegutidum.onlinewebshop.net/the_gettysburg_address_by_abraham_lincoln.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/fasuse.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_off0000e498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE498 5376 bytes
SHA-256: 1900f70f59c5b1f1dfc3a1ebbc77693eec27a7484ceb57adb4a634a1c0722c2c
font_01_sfnt_off0000f715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF715 11072 bytes
SHA-256: 9c7e8f1641c48bd414a35bf99b9c94edc5401c832ae05ab2d3c402d6d36ae457