Malicious PDF — malware analysis report

Static analysis result for SHA-256 376e0d06b92a80c0…

MALICIOUS

PDF

77.5 KB Created: 2021-03-18 07:23:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 152ed2fbe6f876d26607a9d272b03066 SHA-1: 25c2e1ecb88094e59cebff65fc88a02b4eccef4f SHA-256: 376e0d06b92a80c060233926c90c5c9fcd1706c0e0aedec4026f13302d6ece34
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The primary URL, 'https://jumiwimov.ru/strik?utm_term=how+to+work+a+westinghouse+timer', suggests a lure related to technical instructions to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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://jumiwimov.ru/strik?utm_term=how+to+work+a+westinghouse+timer PDF link annotation
    • https://cdn.sqhk.co/raxuzuvuluf/heifRig/wesupisunigivaruxixit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405184/normal_605238afb1494.pdfIn PDF document text
    • http://datingsexchat.site/the_cask_of_amontillado_movie_poster2l3wc.pdfIn PDF document text
    • http://servicesforsupport.com/finding_slope_from_2_points_worksheetcd3ft.pdfIn PDF document text
    • https://jonomivebotuw.weebly.com/uploads/1/3/4/6/134683751/64234f7e24478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503533/normal_604876f9bf7a5.pdfIn PDF document text
    • https://zanixikowupu.weebly.com/uploads/1/3/1/4/131437740/9620533.pdfIn PDF document text
    • http://hookup666.site/imperative_sentenceshqizt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412181/normal_602f1454d8db7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415768/normal_60409da28be62.pdfIn PDF document text
    • https://lopomibuliwipa.weebly.com/uploads/1/3/1/3/131381919/kapurakerivener.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/KgejelM/62468107899.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413121/normal_5ff99003f37af.pdfIn PDF document text
    • http://ductsunlimitedins.com/color_theory_exercisesrbs0d.pdfIn PDF document text
    • http://gopumapi.iblogger.org/42812425016.pdfIn PDF document text
    • http://bepelus.iblogger.org/gudaraxuzusoxuf.pdfIn PDF document text
    • https://fapopadiwa.weebly.com/uploads/1/3/1/4/131438416/vekarogimox.pdfIn PDF document text
    • https://cdn.sqhk.co/mixenezir/eYEhahg/voa_news_radio_frequencies.pdfIn PDF document text
    • https://digexuvin.weebly.com/uploads/1/3/2/8/132814990/8c4bd21ad788f3.pdfIn PDF document text
    • https://cdn.sqhk.co/waxigapo/fqibA80/66848094784.pdfIn PDF document text
    • http://physcoo.com/gowri_kalyana_vaibhogame_mp3_song_free_downloadvdgt8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vurorevebosexu.rf.gd/65479897465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b026a2b-3fb7-4df5-b28f-2abb1dcd7383/grade_8_math_textbook_ontario_nelson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f9da7f0-bfda-44a6-b63f-2f6ab7876112/77707696843.pdfIn PDF document text
    • http://famifel.rf.gd/5346428834.pdfIn PDF document text
    • http://sarigeselos.epizy.com/bazefijapegewewuroj.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_off0000f035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF035 5184 bytes
SHA-256: 4b40446ce1a1725e56189bd5a73ad3377df1f894ca8a9b2abda4a2594dfef99c
font_01_sfnt_off000101be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BE 11236 bytes
SHA-256: b752c708ebb6b5999e6d0dca75aa1e98a9a581e3a74bb3488e2829793693cbbc