Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0673b0568b54635…

MALICIOUS

PDF

82.6 KB Created: 2021-03-15 01:06:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a69693a993c2ebfe1604192ac23e74a3 SHA-1: 9c7e21ced2f67d0ab36263d7cefd924acbf68c44 SHA-256: b0673b0568b546354dad6b6f860297323b48c431a2c63dc7e9c9da066f5f84a2
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The primary URL, https://mezovuduw.ru/strik?utm_term=lock+pick+kit+near+me, is presented as a lure. ClamAV and ML classifiers also flagged this file as malicious, indicating a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=lock+pick+kit+near+me PDF link annotation
    • http://nomudepalak.medianewsonline.com/kofoxaxiluwiragukava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375507/normal_601591adbe9e0.pdfIn PDF document text
    • http://votixibutiro.medianewsonline.com/77557076525.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411218/normal_60157f5780248.pdfIn PDF document text
    • http://nafewid.sportsontheweb.net/vovezibigikilewumimebeja.pdfIn PDF document text
    • http://gexuniganije.iblogger.org/kosigedogabinaref.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/99262409910.pdfIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_861aa247fccb4f13b4c38d1971e1c82d.pdf?index=trueIn PDF document text
    • http://miganuvag.myartsonline.com/autocomplete_textbox_in_asp.net_core_mvc.pdfIn PDF document text
    • http://gusufarafedi.epizy.com/33399307705.pdfIn PDF document text
    • https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_83951dc8ad0849ab93aae53112dca790.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/gelivumigijisiw.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_a75608ffa2e347ac8fafca84351e402d.pdf?index=trueIn PDF document text
    • https://5c2cca0d-3a4e-48b0-93bf-8ac6c0c026cb.filesusr.com/ugd/271e65_fe7dca69cef94703964d97e136363825.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/54678795848.pdfIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_e8b38092a7214a43b8ecbcdad17a5c87.pdf?index=trueIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_d244a7d8e2dc4ce5b81693d998da6ce4.pdf?index=trueIn PDF document text
    • http://gukasitaxe.epizy.com/wogexi.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/38782093155.pdfIn PDF document text
    • http://xizevobawilu.epizy.com/jemunujazonometizapi.pdfIn PDF document text
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_d2a02793104a48e1a7cf91803394f795.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_off00010874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10874 4876 bytes
SHA-256: 2c2b94f78d75bc2f7b95d37913f176b851bce8fad9c1603c36c6c315657bf2f1
font_01_sfnt_off000118fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FE 10568 bytes
SHA-256: fff66f8859bff6d60c08bf22a0c89e6e12cc8dc4b30159e8cda7a789129b19f5