Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fea979ebdf82c80…

MALICIOUS

PDF

75.1 KB Created: 2021-03-06 06:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e44c2046467082aeef4bd6ca729150d7 SHA-1: 4f0cb316be71affd3687e0d453e63de4f57e315a SHA-256: 6fea979ebdf82c800dad438acf28be0935c143b2dce6d498074199d294c3d7db
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, many with UTM parameters, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were extracted, the PDF structure and embedded URLs point towards a common tactic of using seemingly innocuous document content to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/aws?utm_term=replacing+ice+maker+in+maytag+refrigerator PDF link annotation
    • http://sizegoduxuxa.mygamesonline.org/7604519322.pdfIn PDF document text
    • http://sweetygirl.club/wozinonoveboj5lpp.pdfIn PDF document text
    • http://dkmz1.club/libro_de_marketing_digital_grati6xk79.pdfIn PDF document text
    • http://dotenipago.medianewsonline.com/11066674572.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/texas_instrument_ti-83_plus_wont_turn_on.pdfIn PDF document text
    • http://xorimomupajo.scienceontheweb.net/george_foreman_net_worth_2019.pdfIn PDF document text
    • http://topstop.site/gba_rom_hack_pokemon_glazedrr4or.pdfIn PDF document text
    • http://fionainthefield.org/20890915155kc3u2.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/wigejavar.pdfIn PDF document text
    • http://magazinrf.xyz/roxivezifefogo7blj4.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/how_to_do_a_toe_touch_cheer.pdfIn PDF document text
    • http://domen3.club/ipc_j_std_001sdsgy.pdfIn PDF document text
    • http://nibajafij.medianewsonline.com/dyson_big_ball_multi-floor_canister_vacuum_filter.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/how_to_clean_ratchet_straps_by_dirt_farmer_jay.pdfIn PDF document text
    • http://kapusta.pro/4081116999igvgp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_74d282a1fae041db8fefbf50911730f5.pdf?index=trueIn PDF document text
    • http://salajire.onlinewebshop.net/salejugorusejipexo.pdfIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_c3ce823d92a24477b545d1fa7bc8e2f3.pdf?index=trueIn PDF document text
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_7dbdde5ebc5e415a95f97bba797d41c8.pdf?index=trueIn PDF document text
    • https://52a1af19-6946-4c37-aba6-ab00a30e4874.filesusr.com/ugd/5dc3ca_56b30102877f4188932c7363c469a436.pdf?index=trueIn PDF document text
    • https://e02212b7-c8ec-4bf5-ba3e-d68a1de675e0.filesusr.com/ugd/7f1d73_6749c7f556694db1aa585ecb3f68bdec.pdf?index=trueIn PDF document text
    • https://a96990da-dd17-4b11-844c-aba2d588d1b6.filesusr.com/ugd/5e5e7b_be9adf94458d425daa12a10bf51258ac.pdf?index=trueIn PDF document text
    • http://pudosuvosav.atwebpages.com/55333095979.pdfIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_b419e85684d7447a976fba267d6136d1.pdf?index=trueIn PDF document text
    • https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_2b5feb275e1742aea038fd47ed64a126.pdf?index=trueIn 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_off0000e784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE784 5332 bytes
SHA-256: ee01485a765a053f8f7e4d191a63405786bb94c7a74926dba4267d15fec6cd9e
font_01_sfnt_off0000f9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A7 10800 bytes
SHA-256: ab8c9571037f88dc08f10d5b646588b05470c1760a71ff930fb2dd90408f5904