Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4700b9c8ef0a8f…

MALICIOUS

PDF

70.2 KB Created: 2020-12-07 00:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9caa16203f657be48e1140159a686187 SHA-1: b144ef55c169fbe9aa5301e3ce65fd33ba80dbb5 SHA-256: 2e4700b9c8ef0a8f0dd1bc69bfaac449ae4d81bb3cedbece77c646e544fbe850
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, and also detected by ClamAV as Pdf.Phishing.Trojan. The file contains a large number of external links, many pointing to disposable hosting services, indicating it functions as a link farm. The primary URL observed is 'https://traffset.ru/123?utm_term=short+stories+with+wh+questions+pdf', which likely serves as a redirector or entry point into this network of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=short+stories+with+wh+questions+pdf PDF link annotation
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/welemunifajil_muwedalefuj.pdfIn PDF document text
    • https://dosabaret.weebly.com/uploads/1/3/4/8/134861273/6134995.pdfIn PDF document text
    • https://xolitosoxi.weebly.com/uploads/1/3/4/5/134583661/4365841.pdfIn PDF document text
    • https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/c6d794b8.pdfIn PDF document text
    • https://fiselowozol.weebly.com/uploads/1/3/4/3/134366189/nefov.pdfIn PDF document text
    • https://gukenefekofuga.weebly.com/uploads/1/3/4/5/134588358/ponalelugadus-wopotos-fememaj-sodizekitesax.pdfIn PDF document text
    • https://jugubiwujivivej.weebly.com/uploads/1/3/4/3/134352954/24ca7f1424.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc14b808139af037647f366/t/5fc2e5712dd96f59184df77a/1606608245955/libojupunewoberoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6de90fd4-d261-44df-8aff-f316f8a9a27e/sekefebifakafosod.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/45909031561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c58304-a7fa-448a-b453-a05c61e71ec2/meroga.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18365f9866f3fd2d8aaf8/t/5fc4ed63145a8629dc4b22ab/1606741349382/forest_creek_hoa_selma_tx.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC838 5088 bytes
SHA-256: 9d53c38f0d6ff28b9d244243dc996c6353405bd99626b9867d6ee868ac55f8ab
font_01_sfnt_off0000d98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98A 10864 bytes
SHA-256: 32a3a659cc829f7987f947add1d4c99c38083e79b7e7d3282890afed5ce498c9
font_02_sfnt_off0000fded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDED 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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