Malicious PDF — malware analysis report

Static analysis result for SHA-256 05eb919863f44fda…

MALICIOUS

PDF

82.8 KB Created: 2021-03-14 23:56:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a32946d9675e6d29aebb288a7f40aeb1 SHA-1: 2b7e6fca2282512dff18976e46d3d04cb53257d9 SHA-256: 05eb919863f44fdad8fdd7b1c1ce7f678b274e8a512fdd6ab0c9fb4d66c79ce9
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 0.9993

Heuristics 6

  • 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 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://leonvi.ru/strik?utm_term=how+to+administer+medications+through+peg+tube PDF link annotation
    • https://xiruzukigipimog.weebly.com/uploads/1/3/4/8/134865515/2577287.pdfIn PDF document text
    • http://aycotoro2.xyz/28298428785jbcyi.pdfIn PDF document text
    • http://gonzo-3d.com/79977702778kihdm.pdfIn PDF document text
    • https://xalitive.weebly.com/uploads/1/3/4/3/134320973/jibinaruwiguzu.pdfIn PDF document text
    • https://botugesoxa.weebly.com/uploads/1/3/4/5/134509905/ba447de.pdfIn PDF document text
    • https://xonutadeb.weebly.com/uploads/1/3/0/7/130775355/be6a5c47e.pdfIn PDF document text
    • http://skywonder.space/what_is_the_symbolism_of_the_cruciblej44nf.pdfIn PDF document text
    • http://flipping-car.online/850033469954k3a7.pdfIn PDF document text
    • http://farvestnn.ru/calligraphy_cursive_writing_worksheetslk5qx.pdfIn PDF document text
    • http://karnaval.host/stihl_br_600_magnum_blower_parts47cxo.pdfIn PDF document text
    • http://fruittea.space/database_management_jobs_work_from_homefx8gu.pdfIn PDF document text
    • http://asta-stroy.ru/gerald_corey_counseling_and_psychotherapyd732l.pdfIn PDF document text
    • https://kupepepa.weebly.com/uploads/1/3/0/8/130874668/wapewu.pdfIn PDF document text
    • https://bedapidipofawif.weebly.com/uploads/1/3/2/7/132711979/7834158.pdfIn PDF document text
    • http://idealicaitalia-official.site/milady_cosmetology_textbook_download0e616.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/voicemail_greetings_iphonexe2sy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/80b4e210-e800-44a0-be9b-714ffd7aed51/tubira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4ce3aaa-048f-40ed-800b-f02425d407e0/what_does_margin_of_safety_in_business_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc18faff-0c4a-4459-b7ac-db96f0640caa/briggs_and_stratton_portable_generator_repair_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6eb3d7e-429f-48e6-a459-e91f306a84d3/senozawizopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be21e37-3b80-4855-9ef3-287fff128690/opus_life_is_life_lyrics_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de971093-a814-4715-9a5d-ca7673adc95c/core_java_coding_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e693f523-5a0f-46eb-b472-1e8407e7e44d/belgian_browning_a5_serial_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/621fdf3c-e239-404f-9619-8a0efd70c9bc/why_is_ctrl_not_working_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e61c493-f4f6-4682-9cc0-7719ba310f7c/jovafer.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_off000106c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C2 5648 bytes
SHA-256: 0bdd90889c41404cecea56db3032b7a128a452dcd2684b48142d04693664bd31
font_01_sfnt_off000119da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DA 10284 bytes
SHA-256: c87e8b4e62fcc18ae046c3d24de5e8424e0153146a8c391c403e1cf72cf0357e