Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee13480e360850a…

MALICIOUS

PDF

69.1 KB Created: 2020-11-13 08:03:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 928b351053d854c1dab697b4ba0b1b98 SHA-1: bf341c576f297b12ec84085b2ce83a1ff74ac479 SHA-256: 2ee13480e360850aa8cb4dcd14dbf984ae49c053c80e09b0a19e633e6601e1a3
184 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URLs suggest a phishing or malware delivery attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://cctraff.ru/strik?utm_term=return+man+4+linebacker In PDF document text
    • https://laverikiwife.weebly.com/uploads/1/3/4/5/134502667/4004344.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/e2f1aedfe9cc.pdfIn PDF document text
    • https://zowimebewira.weebly.com/uploads/1/3/1/6/131606727/paverifutodofuf-zobiwikiz-zuwotajafer-mepamuterixud.pdfIn PDF document text
    • https://dibozuvoba.weebly.com/uploads/1/3/4/6/134692955/1a12e32a6398.pdfIn PDF document text
    • https://woliwejimagevin.weebly.com/uploads/1/3/4/3/134319070/selidos_mitip_guvunub_wedor.pdfIn PDF document text
    • https://jaxumemiri.weebly.com/uploads/1/3/4/4/134465633/jifelebexulexof_towidifavo_detawarowe_nawepikaped.pdfIn PDF document text
    • https://devuzagobeli.weebly.com/uploads/1/3/4/4/134431767/rigepemurav.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/a63fb.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/juvuraguvutoxif/proverbs_from_things_fall_apart_page_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cbfd991-a888-4002-a9ea-9f709f8b57b6/36988926423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6583ed4-9e6c-43b8-a733-c216443593e2/the_cove_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/reformed_theological_seminary_free_online_courses.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/lilovopuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7359f631-f26f-4719-b52f-ad7a98fd29b5/hot_plate_chemistry_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a1bf162-af9e-463e-ab18-646023f8e657/kefomivisebivekorawaxalo.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/double_angle_worksheet.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_off0000d153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD153 5068 bytes
SHA-256: 2750635de2dfd58135bf6d53e3ecc424ec959a2adaa76e1aa998d9f06a2b1bb5
font_01_sfnt_off0000e27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27F 10928 bytes
SHA-256: 4a3330942828365d02e3ad196e3cc8175977b0d7b52d93a1036cb573730bb755

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