Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb0a485714ab7a4…

MALICIOUS

PDF

75.5 KB Created: 2021-06-03 12:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c8336e74a19a509a0a0234d2848f90b7 SHA-1: 573a7ff1f8a3c2339cdc7d5745bf03caf5fb02a6 SHA-256: abb0a485714ab7a475b9fc07435d461a121f8ce6ac0419e54536e6b3ebad3d36
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

Heuristics 5

  • 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 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://nomylo.ru/pbw?utm_term=cheat+diamond+sniper+3d+apkpure PDF link annotation
    • https://titunugum.weebly.com/uploads/1/3/7/5/137501990/0a922a.pdfIn PDF document text
    • https://sitoluvumoroge.weebly.com/uploads/1/3/4/7/134762666/zopesejediju-vositolif.pdfIn PDF document text
    • https://timowerudep.weebly.com/uploads/1/3/0/7/130738780/aa7f37058f5204.pdfIn PDF document text
    • https://kuwisuzom.weebly.com/uploads/1/3/4/0/134017610/2a7d1da2e6aca.pdfIn PDF document text
    • https://penomagara.weebly.com/uploads/1/3/2/6/132695387/fidumiz-mixukajejojuki-gebufage-nefed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wozixokumo.pbworks.com/w/file/fetch/144434964/jojexalojirejemajat.pdfIn PDF document text
    • http://sokulus.pbworks.com/w/file/fetch/144467253/xetexitixizunulemarub.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/w/file/fetch/144557958/arabic_letters_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34484cd5-ec8f-43fd-b2b2-38834a10b808/84822901840.pdfIn PDF document text
    • http://pinurakus.pbworks.com/w/file/fetch/144542838/how_to_return_eip_to_irs.pdfIn PDF document text
    • http://zuvuzut.pbworks.com/w/file/fetch/144549765/order_of_operations_with_integers_worksheet_answers.pdfIn PDF document text
    • http://numefen.pbworks.com/w/file/fetch/144536367/how_to_get_chess_titans_on_windows_10.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/f/jogomowivir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0185c039-55d4-4a3e-a999-4acdabb87a7f/47213562247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac107e61-ffb0-413b-a5ea-a0de8b12af60/69921389345.pdfIn PDF document text
    • http://pobonagul.pbworks.com/w/file/fetch/144463674/adobe_audition_cs6_free_download_with_crack.pdfIn PDF document text
    • http://lifelekufa.pbworks.com/f/kazonunasifid.pdfIn PDF document text
    • http://kinuwibe.pbworks.com/w/file/fetch/144444360/occupational_therapy_discharge_note_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d672c1a8-2fec-490b-b845-7d073029d790/16489511654.pdfIn PDF document text
    • http://mumubib.pbworks.com/f/mijokosimimurako.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_off0000e9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E1 5300 bytes
SHA-256: 8891bd7f94486eb4392292545809f8265b2e84ca343daa7f9f03c5b7d416ed20
font_01_sfnt_off0000fbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB4 10816 bytes
SHA-256: cc2ca8ab76be4996d0627d08e780ae25475e5777a54d9779498e46b79ab4dba3

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