Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b781558404a258…

MALICIOUS

PDF

75.3 KB Created: 2021-05-18 21:36:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d48aa0ee3caead2373421e578a9beb4a SHA-1: cdeed73686e722e36126c8f4143e11b1129ae9bf SHA-256: 91b781558404a258ec55b9b2fca0fffd1c5931605d41ec438ad160a5ed537033
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://jumiwimov.ru/strik?utm_term=avon+commission+chart+uk PDF link annotation
    • https://dagojamigim.weebly.com/uploads/1/3/4/7/134763314/3247338.pdfIn PDF document text
    • https://jagalanir.weebly.com/uploads/1/3/1/0/131071056/fididepiperine-gofuxonev.pdfIn PDF document text
    • https://xikefopu.weebly.com/uploads/1/3/4/7/134748362/3345403.pdfIn PDF document text
    • https://fabirakarag.weebly.com/uploads/1/3/2/7/132710689/bifilit.pdfIn PDF document text
    • https://penuwoguf.weebly.com/uploads/1/3/6/0/136056634/ganimukipaso.pdfIn PDF document text
    • http://gopikapi.22web.org/sazaxojuvisu.pdfIn PDF document text
    • https://zasevolonuto.weebly.com/uploads/1/3/5/3/135335071/4862091.pdfIn PDF document text
    • https://bupekotarox.weebly.com/uploads/1/3/0/7/130739944/zilatusoletemejano.pdfIn PDF document text
    • https://wadoruzog.weebly.com/uploads/1/3/1/3/131379034/2944451.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/f63dec89-8229-40a5-9e63-00e749da7de5/who_filed_ucc-1.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/62750148517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a745e415-7059-4f0b-b279-d9c15b06dad1/jopodaxuluzepimexozenipig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/badaecbf-6f58-4eca-a783-1c823cd4e7f6/air-lap1142n-a-k9_setup_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/bahubali_1_cinema_patalu_ing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7918db8a-0b61-4b59-9af5-8261a15937d4/61333227174.pdfIn PDF document text
    • http://nuxavezuzoja.epizy.com/focus_group_interview_guide_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/garmin_430_sim_ipad.pdfIn PDF document text
    • http://denikisej.rf.gd/what_are_netflixs_secret_genre_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/20350530165.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_off0000e844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE844 5120 bytes
SHA-256: 2adb53d86e3ee8fbdaa742443c6b9e456ae84b15bcff93b1766e3adfe3311c26
font_01_sfnt_off0000f985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF985 11360 bytes
SHA-256: ba20095336ca029971775c0a5887eb775c308ca82e932ebdd98740a7600046a1

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