Malicious PDF — malware analysis report

Static analysis result for SHA-256 80bda7116e720b2a…

MALICIOUS

PDF

79.4 KB Created: 2021-03-15 10:20:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4690ffd4530216611d491292f03ec595 SHA-1: 8f6e3fd2e52b37b98a9b013f37eda01b68f0a73f SHA-256: 80bda7116e720b2a4f6d8bc46ae06ec82b25ed8d6b80a11d0ffc4e5511b0f306
194 Risk Score

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. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/strik?utm_term=acer+aspire+e14+e5-475g+battery+removal PDF link annotation
    • http://dimozakebaba.scienceontheweb.net/sinujuretuzugujonumonozaj.pdfIn PDF document text
    • https://tiwirekofer.weebly.com/uploads/1/3/5/3/135314588/buregux.pdfIn PDF document text
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/4852527.pdfIn PDF document text
    • http://pinenud.mygamesonline.org/99061642517.pdfIn PDF document text
    • https://cdn.sqhk.co/wepigosogo/A8SrjeT/greeting_cards_design_template.pdfIn PDF document text
    • http://kirudikegopoded.sportsontheweb.net/rojano.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/HgjjamT/girug.pdfIn PDF document text
    • https://cdn.sqhk.co/pewesopefim/hjdXyjh/rewemogupeduwikinekado.pdfIn PDF document text
    • http://pifemukopisare.sportsontheweb.net/82926475481.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/which_bible_uses_yahweh.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/1gfjhii/how_far_i_ii_go_tiles_hop_beatles.pdfIn PDF document text
    • https://cdn.sqhk.co/wotirixa/b0ljjid/zombie_frontier_1_mod_apk_revdl.pdfIn PDF document text
    • https://jigejoxipivigif.weebly.com/uploads/1/3/4/7/134731155/3545384.pdfIn PDF document text
    • https://nogenovone.weebly.com/uploads/1/3/4/7/134745979/4649197.pdfIn PDF document text
    • https://cdn.sqhk.co/ditamozulipo/jekghjj/72269326618.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/bHji496/download_game_navy_battleship_attack_3d_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_3d2f1775c1024e048e4f29bd87a367b8.pdf?index=trueIn PDF document text
    • http://mevedokepovi.epizy.com/on_the_banks_of_plum_creek.pdfIn PDF document text
    • https://9610c43f-1b2a-4a8a-b660-75aaf3908198.filesusr.com/ugd/286fb8_4404ef7f47f84173bee218855e586297.pdf?index=trueIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_d0f8db624c8e4f1ba37b6e7aa5230204.pdf?index=trueIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_553f4782e10441d1b6080ec45ebe4129.pdf?index=trueIn PDF document text
    • http://vexidolovosope.rf.gd/54922018151.pdfIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_5ed39491742f48e5814c2ff7e83cf3dc.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_off0000f656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF656 5920 bytes
SHA-256: bff7b2dc60d2c5eaef72e3ae7d23fd0f36309a11612bfc3e6835bc9aadc19067
font_01_sfnt_off00010a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8E 10964 bytes
SHA-256: efbce6099bf630e57cc3273a7073b81f81b104f5d191541e6e8540fdc51c0a22