Malicious PDF — malware analysis report

Static analysis result for SHA-256 654a66e6bf6ff35a…

MALICIOUS

PDF

79.9 KB Created: 2021-04-06 22:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cb82d24eba984e861dd2b7429fa83ee5 SHA-1: d10ad25382278294c7eee2d93eeb2abe3111fb41 SHA-256: 654a66e6bf6ff35ad5736a5185b6682e9ebde9d7c01b71247b71575d14c959ae
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 ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links pointing to various PDF files hosted on disposable domains, indicating a link farm or SEO abuse tactic. The presence of multiple external URIs and a link farm on disposable hosting suggests an attempt to distribute malicious content or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/123?utm_term=accidents+reported+today+el+paso PDF link annotation
    • http://vatidenow.medianewsonline.com/vuvatufazofigajukox.pdfIn PDF document text
    • http://kitixukizogutik.mygamesonline.org/ccna_sybex._free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/cNhdTWU/20001579772.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/pdf_agama_islam_kelas_10.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/hgQzQge/pacific_time_to_gmt_1_converter.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/hckwgef/football_official_uniforms.pdfIn PDF document text
    • https://cdn.sqhk.co/fapebenu/g4jjids/zimavuwurukomaporarux.pdfIn PDF document text
    • https://bemozepe.weebly.com/uploads/1/3/0/7/130739793/7297264.pdfIn PDF document text
    • https://xebazasasixuj.weebly.com/uploads/1/3/4/6/134641459/ligigodarawipok_lexubuzejuf.pdfIn PDF document text
    • https://cdn.sqhk.co/senogewuki/MjehivE/rarity_my_little_pony_theme_song.pdfIn PDF document text
    • https://nefupoxuwuridek.weebly.com/uploads/1/3/4/7/134747690/salaredupovagon.pdfIn PDF document text
    • http://waparudadip.mywebcommunity.org/application_letter_for_job.pdfIn PDF document text
    • https://resawipodejevi.weebly.com/uploads/1/3/0/8/130814711/ferefixava.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://raxexirep.epizy.com/fosigatari.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/88904641615.pdfIn PDF document text
    • http://fuvamawijivef.atwebpages.com/96917724000.pdfIn PDF document text
    • http://wixudilasajigil.rf.gd/70785984677.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/fuxerebapinutuxopad.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/41146281615.pdfIn PDF document text
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_d5161f76f606499fa94b3bf39de4c908.pdf?index=trueIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_7234455b5f044fed92ee9740c023ef9d.pdf?index=trueIn PDF document text
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_1a2d69d00a9c44d49d64d7e0a6202f44.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_off0000fac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC2 5160 bytes
SHA-256: 8cbe3614578fb9aef8acddc16325f04c52bac0c898b08324691bcd61a4945d23
font_01_sfnt_off00010c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C62 11208 bytes
SHA-256: 7ed479d3a05aa1f6733e70fc04e9540023c0ddddba7118de124e2f9b6db50e1a