Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02a634727e3b030…

MALICIOUS

PDF

76.9 KB Created: 2021-03-14 04:22:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f2812f855ed3ba2c0256d9ec2f892fef SHA-1: 46826f79d2dd72d52bb859fca006bc32b2f5ff28 SHA-256: b02a634727e3b03014405c94ab93a0d0f479ec967c3b4ebf954e3c30e6e04e50
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to merging PDF files. The presence of a malicious redirector and a high ML classifier score strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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 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.
  • 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=merge+pdf+files+mac+os In PDF document text
    • https://ridejotewofo.weebly.com/uploads/1/3/5/3/135314456/vawerenano.pdfIn PDF document text
    • http://nebo-baikala.ru/what_is_the_best_home_security_system_to_buyya5bv.pdfIn PDF document text
    • http://lifeshop.pro/lifetime_54_in-ground_crank_basketball_hoop_reviewsm3jlu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427295/normal_601b3a7f13e41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488103/normal_604d3b0618da1.pdfIn PDF document text
    • http://tihefers.online/jonisadafiwon3mxlb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379491/normal_5fde716e01bdd.pdfIn PDF document text
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/a33136ed0116.pdfIn PDF document text
    • https://wumifidadorubip.weebly.com/uploads/1/3/5/2/135298964/59d5cf.pdfIn PDF document text
    • https://nasamokazefo.weebly.com/uploads/1/3/6/0/136049887/nopitopexob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489441/normal_604b47b384647.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447466/normal_604637a87afb4.pdfIn PDF document text
    • http://findattime.com/94653533896x4qru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497110/normal_603dc974ac80a.pdfIn PDF document text
    • https://roxuxafuz.weebly.com/uploads/1/3/0/8/130813852/mitakibodijas_wimowotox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418574/normal_601bde88b45b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/ginejurasuwituka.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/jubabemekazijugofesuk.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/futav.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/why_does_a_diesel_blow_white_smoke.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/gravity_forms_notification_email_format.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/lyme_disease_guidelines_ontario.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/45977474353.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/zugefopa.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_off0000efc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC1 5480 bytes
SHA-256: b486fa119bbdd73c62ff1ce14ff68505c231a08874eda07ba514a512fa4631f6
font_01_sfnt_off00010262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10262 10504 bytes
SHA-256: 0d18f87c2948a85dd69647dfc09e23a871026171d724f3548c52c2b094da64d0

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