Malicious PDF — malware analysis report

Static analysis result for SHA-256 4880e3854eeeee10…

MALICIOUS

PDF

74.1 KB Created: 2021-04-22 08:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a41e80f091b0cf41b42ea6f2f37e333e SHA-1: 5c19c62f393bcd72459b8078e7ffdc44a8d65c72 SHA-256: 4880e3854eeeee1028a0f29a96b95c5a31517bab38f9b4acfb22734c91b5a2e8
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 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=how+to+stop+a+squeaky+kenmore+dryer PDF link annotation
    • http://datingdate.site/sujupukiaa54m.pdfIn PDF document text
    • https://tarezusubem.weebly.com/uploads/1/3/5/3/135386237/1945914.pdfIn PDF document text
    • http://doctorzlo.com/24583116042wlczi.pdfIn PDF document text
    • http://peuly.xyz/karumanchi_data_structures_python5voc8.pdfIn PDF document text
    • https://rebavunegiluzu.weebly.com/uploads/1/3/4/4/134497465/sodama.pdfIn PDF document text
    • http://sesalon.xyz/algorithms_illuminated_part_1_by_tim_roughgardenxhaa8.pdfIn PDF document text
    • https://sotinele.weebly.com/uploads/1/3/4/6/134640455/9931593.pdfIn PDF document text
    • http://opt15.ru/33830821710u9qo6.pdfIn PDF document text
    • http://jiwafuwik.22web.org/digital_marketing_meaning.pdfIn PDF document text
    • https://geworusidexaj.weebly.com/uploads/1/3/5/3/135306562/desimetuzexevikug.pdfIn PDF document text
    • https://zoparojo.weebly.com/uploads/1/3/4/7/134762662/zafageg.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/what_order_does_narnia_go_inpl1ep.pdfIn PDF document text
    • https://toruruxixe.weebly.com/uploads/1/3/4/6/134698343/9540185.pdfIn PDF document text
    • http://in-arenas.com/86008904045u1dp2.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/kudewul.pdfIn PDF document text
    • http://sdfafq.info/18745547313262zt.pdfIn PDF document text
    • http://baranaydin.org/858087979641e0sg.pdfIn PDF document text
    • https://sudopefizumizer.weebly.com/uploads/1/3/1/3/131383323/zemoxudusuze.pdfIn PDF document text
    • http://mesretly.xyz/rubiganusilijeiohny.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pamajaxa.epizy.com/40821685125.pdfIn PDF document text
    • http://xokilovemu.rf.gd/44762003736.pdfIn PDF document text
    • http://laxuraxosolun.epizy.com/59877356951.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_off0000e366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE366 5420 bytes
SHA-256: a550e520dba5a54391dad67412e7b53c00a517d54193c79bc81640abaf505c28
font_01_sfnt_off0000f5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D0 10892 bytes
SHA-256: ce10446564585bb3e5b3106d05aad7d7e39e813e44dbcdd8d02db0bb886f384b

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