Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd4ea557886395c2…

MALICIOUS

PDF

76.3 KB Created: 2021-03-13 14:02:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62ba19b75b2f400045809ded0dd8674c SHA-1: eb90dc7fe49956290d5fcd9b3424f2cde5009377 SHA-256: bd4ea557886395c28dd2f5df28c3a420021f500a1feb3b86b2b2e2b67683252e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan distribution attempt. The PDF contains a mass external link farm, with one prominent URL pointing to a search result for 'plant cell labeled organelles', suggesting a SEO-based lure. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/wix?keyword=plant+cell+labeled+organelles
    • https://woninulanomawij.weebly.com/uploads/1/3/4/6/134670754/xonasibuvugedar.pdf
    • http://woxupepij.iblogger.org/diablo_2_necromancer_summoner_build_guide.pdf
    • http://sluzhba1.net/what_qualifies_as_a_short_term_disabilityholp7.pdf
    • http://kifavofo.22web.org/treatment_of_pediatric_hypertension_guidelines.pdf
    • http://momentikshop.space/jupiter_merlin_income_factsheethof4q.pdf
    • http://matroskin.space/fiwojukanamunipedu45dw.pdf
    • https://zefisuket.weebly.com/uploads/1/3/4/8/134868467/vozozabu.pdf
    • https://xafijaxipumin.weebly.com/uploads/1/3/5/9/135966545/0c75ca7.pdf
    • https://wifusudufasebo.weebly.com/uploads/1/3/5/9/135992472/raronenezivorot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b901e360-cfe1-4bb8-ac0e-6b95616e7f3e/kusudegumibopow.pdf
    • https://uploads.strikinglycdn.com/files/0211ea9e-27f5-4393-9e75-d6c5a6c40cf9/zerilaga.pdf
    • https://uploads.strikinglycdn.com/files/c7aa7f41-459d-4082-b739-abd71a8cad2e/12291238587.pdf
    • https://uploads.strikinglycdn.com/files/2458cd38-93b1-4f69-b2fa-042f772d6e25/m_s_word_2010_shortcut_keys.pdf
    • https://uploads.strikinglycdn.com/files/8a026b22-812d-40a2-935c-90ce21eaa3bb/56146393218.pdf
    • http://sitowofe.rf.gd/wedegudadam.pdf
    • https://uploads.strikinglycdn.com/files/d98f22fb-fcf3-4e84-84e5-9a6bbb64059a/lurixisezemebomuraxo.pdf
    • http://wepirizifomonij.epizy.com/will_service_engine_light_come_on_for_oil_change.pdf
    • https://uploads.strikinglycdn.com/files/b2ef7664-9638-4180-8fa1-914077bf1844/toxirudutitewa.pdf
    • https://uploads.strikinglycdn.com/files/0569c4cc-7541-423b-bc6f-a6eb4359e086/vituwifipozet.pdf
    • https://uploads.strikinglycdn.com/files/2dd1bd89-d582-4533-824a-f061c29ac91b/botukikebuxilu.pdf
    • https://uploads.strikinglycdn.com/files/fe84ebf5-7f0b-42f4-89af-406431fd9121/saxadojaben.pdf
    • https://uploads.strikinglycdn.com/files/6e9ac0b7-ffc8-45f6-bb57-dadd2b74b413/rubakavujiromidadi.pdf
    • http://vokenijor.rf.gd/jarupopukigebakobe.pdf
    • https://uploads.strikinglycdn.com/files/a1788e91-5424-425a-9b3f-e3cdd3629f28/16009123604.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0e.bin
d2b5f4174c7fda65eb29bf399dbf3289d2c072168d09ca0627e8ef757de58c6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 5248 bytes
font_01_sfnt_off0000ffef.bin
639e7e6b57099885da015f15e9a54c93a1f2dcb470e672ad09070d21a6730ba5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEF 10376 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.