Malicious PDF — malware analysis report

Static analysis result for SHA-256 6354666531d7a011…

MALICIOUS

PDF

92.4 KB Created: 2021-03-09 00:42:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ae5e532cf99f2b033c8be67baaf92d63 SHA-1: 173ddbff80961ee3cc12e42a81c8e8d612539ae3 SHA-256: 6354666531d7a011bbe29ed8fa4db075197505d0683640293ff4a157bd7f4df7
192 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate the document is designed to redirect users to potentially harmful sites, likely for phishing or malware delivery. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://dafemum.ru/award?keyword=around+the+world+in+80+days+jules+verne+book+pdf In PDF document text
    • http://interplast.ru/leap_of_faith_far_cry_5mkrjp.pdfIn PDF document text
    • http://hairhome.moscow/does_burger_king_do_breakfast_ukcq9ij.pdfIn PDF document text
    • http://zigogofarotago.22web.org/nys_boater_safety_course_study_guide.pdfIn PDF document text
    • http://moxegelubopidi.sportsontheweb.net/fuvunejaxazabobevunafe.pdfIn PDF document text
    • http://rejasikega.scienceontheweb.net/how_to_use_spirit_points_smash.pdfIn PDF document text
    • http://bokifov.iblogger.org/molarity_and_molality_practice_problems.pdfIn PDF document text
    • http://lojasamericanasbr.com/werokifewilojaxiziji46w.pdfIn PDF document text
    • http://nevogixire.22web.org/telugu_movies_2018_tamil_dubbed_hd.pdfIn PDF document text
    • http://rorixuge.iblogger.org/pumosidonigoxokoxozil.pdfIn PDF document text
    • http://lifipumajetug.22web.org/buzavapisipomot.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/eheim_2217_manual0a2ru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dapekafuxururo.myartsonline.com/tubijoni.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/briggs_and_stratton_6250_watt_generator_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/16093397723.pdfIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_8382994900fb49f2b1d86741eb5f27c5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/22538342577.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_608f382dc5044460b8793232b88e710c.pdf?index=trueIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_2c80da7839ad4421b641bf11f9739c62.pdf?index=trueIn PDF document text
    • http://fimokixavojakuf.epizy.com/52919220885.pdfIn PDF document text
    • https://b9264059-5ce6-458a-812b-58b21e0c51d1.filesusr.com/ugd/9a3dc1_7091ee69616e4fe99a89c901e63c096e.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_off00012a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5B 5988 bytes
SHA-256: 2c302b551820d539385cc6e983f272b41f6c3420900e20ab8e11f3c96952bcb8
font_01_sfnt_off00013ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED3 10852 bytes
SHA-256: 3c4e849195787954c614df619fbfcbf37470ecd388eb050b7076a4e8f33e2c34

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