Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb226a500cdce19…

MALICIOUS

PDF

97.8 KB Created: 2021-03-16 01:32:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: fb7a3b1662a644a437ff498cb730176b SHA-1: 38bff7bc136d251532aedc57b25f0a80a1bbfbff SHA-256: afb226a500cdce1983ea715db25730c54c60c3c49e8c945d3ac4543412a8da34
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to monitor specifications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • 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 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://pelibifir.ru/strik?utm_term=dell+u2410+monitor+specs PDF link annotation
    • https://cdn.sqhk.co/jujadiziga/cfAt6ib/64556055681.pdfIn PDF document text
    • https://cdn.sqhk.co/jabakujivim/vpA7hfy/guidelines_meaning_in_spanish.pdfIn PDF document text
    • http://organize.shop/zisivogof304n.pdfIn PDF document text
    • http://1freedom.space/87457692555r21va.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389353/normal_60401b8f4d6f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481068/normal_6018cf8913db2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417315/normal_60240376aa3e3.pdfIn PDF document text
    • https://cdn.sqhk.co/wapevenupu/fKdN60y/69566398444.pdfIn PDF document text
    • https://cdn.sqhk.co/jezaziritav/dghTihz/42491710646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_6017db5fce492.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479925/normal_5fe5adda60b32.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/wajujowunakuzuledire.pdfIn PDF document text
    • http://wtia.space/36934240001dsrwj.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofodatop/hfOhiT7/80873932120.pdfIn PDF document text
    • http://xawegap.mywebcommunity.org/samugu.pdfIn PDF document text
    • http://emirofficialzm.com/lowakijebagobenuntoft2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/98d0dbe4-a663-40ba-ba7d-c243dbc452a5/how_to_reset_polaroid_s7_tablet.pdfIn PDF document text
    • http://taberadajip.atwebpages.com/esperanza_rising_book_online_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/002e8604-7f2c-4936-8fe8-30bbc39e5fd8/11730921885.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/vaxavifurubujodapelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1acf560b-73d2-48cc-b389-527e086fd755/are_real_estate_contracts_legally_binding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6862d5e7-7aa8-483b-bb72-28791d6d83c3/how_do_i_fix_my_keyboard_not_typing.pdfIn PDF document text
    • http://jatoxat.atwebpages.com/jifazajaxanikab.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/the_everything_candida_diet_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F23 5284 bytes
SHA-256: cd325569ec8bda30247f24465fbed5a17837d24bdf548123db494b3641a95d16
font_01_sfnt_off0001311c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1311C 19660 bytes
SHA-256: 0a618166471cb66883bc9a7f400f920a5eda5d14d8a071614f306b57c1a56787
font_02_sfnt_off00016701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16701 5104 bytes
SHA-256: 8f0f2646a0c587efe1beaf08711af36baf0c24f1bd86dee964b70bf3fdca6c5c