Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffee6d5acc3b4a83…

MALICIOUS

PDF

73.4 KB Created: 2021-03-28 01:20:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f88afd9cc9343d9a4fc40752dbd93ae3 SHA-1: 5b33d09c95eee41e18848ea62b7fd21daa44f722 SHA-256: ffee6d5acc3b4a83a7bbb1ac7fda820707a8252b9a528b42409c23e2613012a1
186 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. 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 0.9956

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.
  • 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.
  • 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/award?keyword=magazine+pdf+file+download PDF link annotation
    • https://mafalipakirufez.weebly.com/uploads/1/3/5/3/135347960/gesigajobegi_mutuvodusefab.pdfIn PDF document text
    • https://sidugavumudoriz.weebly.com/uploads/1/3/4/9/134902227/8695050.pdfIn PDF document text
    • https://cdn.sqhk.co/lipisowonili/jhLhae0/cambridge_checkpoint_science_revision_notes.pdfIn PDF document text
    • https://kodetowunim.weebly.com/uploads/1/3/4/7/134701578/muxele.pdfIn PDF document text
    • https://zibitevurus.weebly.com/uploads/1/3/0/7/130776177/2d96b5.pdfIn PDF document text
    • http://energierecrute-emplois.com/enojada_pierde_piggy_gifsio17j.pdfIn PDF document text
    • https://vebeviwikime.weebly.com/uploads/1/3/4/3/134317270/malogazujij-jakavejal.pdfIn PDF document text
    • http://nout-prodat.site/clash_of_lights_s1_download_apk_2018kckhv.pdfIn PDF document text
    • http://daliadiago.com/actiontec_wont_connectx32ff.pdfIn PDF document text
    • http://wide-do.top/92735576695682wy.pdfIn PDF document text
    • https://cdn.sqhk.co/pojizurigos/ogc1giP/51832018595.pdfIn PDF document text
    • https://kasipuxatupar.weebly.com/uploads/1/3/5/9/135966953/7042878.pdfIn PDF document text
    • http://islemleriniz.org/krups_beertender_b90_vs_b100aeoou.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/4kylq7o/used_asphalt_drag_box_for_sale.pdfIn PDF document text
    • https://finutobinito.weebly.com/uploads/1/3/1/4/131406284/9451922.pdfIn PDF document text
    • https://dolilugufup.weebly.com/uploads/1/3/0/7/130776220/zavupil.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/hialhfN/gasovanodutenewemu.pdfIn PDF document text
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/f860f9b0a6679.pdfIn PDF document text
    • https://cdn.sqhk.co/japanakoga/jepjbif/spider_gwen_comic_free.pdfIn PDF document text
    • http://susadaxaxavotij.22web.org/buck_boost_converter_ti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jorowoti.epizy.com/promissory_note_for_loan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45e9e56b-6545-40f3-a161-be9a1a5a0865/char-griller_legacy_charcoal_bbq_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a30f4991-fb61-447f-9140-83cf93b7608a/96681955737.pdfIn PDF document text
    • http://tovumenigoge.rf.gd/jikirewibama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ea5e46c-c17b-465b-a5a3-323dc02cdb45/another_word_for_sensory_memory.pdfIn PDF document text
    • http://lagexetese.epizy.com/kujexamokoramu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd059c56-9ab9-49f7-84e8-851b41604e4d/dunkin_donuts_iced_donut_calories.pdfIn PDF document text
    • http://puzazodigeza.epizy.com/geico_customer_service_interview_questions_and_answers.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_off0000e30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30A 5084 bytes
SHA-256: 5c54232d530ef1272cc7b763e98feccdfad045242a2aabb655c28932a35b7159
font_01_sfnt_off0000f49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49A 10380 bytes
SHA-256: 5e06fc0b4a696ad7a1bbe6aad84a9e19fd89b80cc351e8d4f99980581494ecdd