Malicious PDF — malware analysis report

Static analysis result for SHA-256 016e071318ae9ece…

MALICIOUS

PDF

80.3 KB Created: 2021-03-20 23:16:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: da43913a3052fecaa45fb56a81b89d45 SHA-1: e779392c9079aeebaecde6ecd2c6cf854d7699e0 SHA-256: 016e071318ae9ece3e9a3d271d22c68f68ce0f0e8dd13212d7545b27d00e356b
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the ML classifier's high confidence score further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/award?keyword=bbmku+holiday+calendar+2020+pdf+download PDF link annotation
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/pafenibapekan.pdfIn PDF document text
    • https://cdn.sqhk.co/poxosafixe/Egib1hh/microsoft_word_halloween_flyer_template.pdfIn PDF document text
    • http://zovofuti.mygamesonline.org/l_angelus_en_latin.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/the_daughter_of_time_josephine_tey_audiobook.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/kofofitezixula.pdfIn PDF document text
    • https://betedodokadez.weebly.com/uploads/1/3/4/8/134882186/famexiribi_nafibelepo.pdfIn PDF document text
    • https://sofamilases.weebly.com/uploads/1/3/5/4/135401016/sipepap.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/jiwizotaximof.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/ibtt1hi/98655789220.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/hiLcSie/ramp_car_jumping_level_11.pdfIn PDF document text
    • https://nofogiso.weebly.com/uploads/1/3/1/3/131398128/2671907.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/how_to_set_a_armitron_sport_watch.pdfIn PDF document text
    • https://nodopemewave.weebly.com/uploads/1/3/2/6/132682748/ce304be9d.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/qighcP1/jezuwisepepozadolizogiwut.pdfIn PDF document text
    • http://kovativegapok.getenjoyment.net/23580169122.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/geXFI75/funix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_bdcef5d9db4b4007bfaa0d9407a4dd48.pdf?index=trueIn PDF document text
    • https://48b7024d-7414-4593-b44d-ed892b96ad15.filesusr.com/ugd/3e5db3_bf12028a363840b78cf44fb6776d6ba3.pdf?index=trueIn PDF document text
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_4334bd5b9170458fbe43ad571086d3bd.pdf?index=trueIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_a5f0275466d44b2baac86df322a50199.pdf?index=trueIn PDF document text
    • https://c931c956-7f53-4e4e-96dc-27d7f003ba63.filesusr.com/ugd/b80c10_6628e331348d4d25b34f97ff903e4f27.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DA 5936 bytes
SHA-256: ea820733d5d2bb2c69632fc5cc88579572a5eb75f123f4581348a16b3c5822b9
font_01_sfnt_off0000fdf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF4 2292 bytes
SHA-256: 71c8e8a8e626379180ec2f0b867d7ababd5a180fd849c5281b528d42c8a8b37d
font_02_sfnt_off00010855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10855 12092 bytes
SHA-256: e013ab4b7d47fe1606ceb9ccabe7c735e254f10676c6cad2f842a5827550ee34