Malicious PDF — malware analysis report

Static analysis result for SHA-256 f32d64137374a78b…

MALICIOUS

PDF

76.2 KB Created: 2021-06-05 14:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 90586dc15d8400905012da1a2899eedb SHA-1: 1dbeffa2d3471d96e35551e1a62d0c7bff1634f6 SHA-256: f32d64137374a78bcdbae7c6705520247b3b97fbe7475f565ec103180900e8da
186 Risk Score

Malware Insights

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

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 0.9991

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://allytemp.ru/pbw?utm_term=ff+stylish+name+for+girl PDF link annotation
    • https://musokolej.weebly.com/uploads/1/3/1/3/131383826/dc4ccdaa0c3bde8.pdfIn PDF document text
    • https://bonopabugo.weebly.com/uploads/1/3/4/5/134581776/logemedavuraro-zemej-fevem-dutamikif.pdfIn PDF document text
    • https://nojokubovurob.weebly.com/uploads/1/3/1/6/131606526/bezepodux_vutedujukud_piriwofike_kidariri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386852/normal_5ff5006d46147.pdfIn PDF document text
    • https://felixitu.weebly.com/uploads/1/3/4/0/134012625/veguwagek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420756/normal_603a8697b1356.pdfIn PDF document text
    • https://pijegedup.weebly.com/uploads/1/3/4/8/134870890/rixenerozijixeguj.pdfIn PDF document text
    • https://mazokozofifux.weebly.com/uploads/1/3/4/3/134305155/2707414.pdfIn PDF document text
    • https://zosomezo.weebly.com/uploads/1/3/0/9/130969149/zipipulifop.pdfIn PDF document text
    • https://zezebeburopixem.weebly.com/uploads/1/3/5/3/135326834/1fd71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387035/normal_6035de4e0f13e.pdfIn PDF document text
    • https://mixuvuweti.weebly.com/uploads/1/3/1/4/131483588/zijavotijodadu-wuzunidirimose-weguwememedebi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5fd38ef4ef937.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4495262/normal_60b5aa94dbae9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/615f4ba3-78b4-4c1b-926e-9274d9bc0868/husqvarna_weed_eater_attachments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d537d5c-e63b-4271-9512-9e73d2f0a33c/jadagapawenujufejeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/451e064a-dec2-4810-9909-42ded2bedfc6/air_standard_otto_cycle_comprises_mcq.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3b12604-c649-42a0-98a9-f1d649e52f67/51551364724.pdfIn PDF document text
    • http://malamojozag.pbworks.com/f/is_ios_more_stable_than_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50489cc5-d287-439f-88a4-6ffd43ede043/barufigakudibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24e6e2ba-4736-499b-a93a-ee6e19f43d1d/77819887840.pdfIn PDF document text
    • http://pakesobiroge.pbworks.com/f/peduwemozenemujipimeb.pdfIn PDF document text
    • http://matekid.pbworks.com/w/file/fetch/144660192/how_to_wash_a_minky_couture_blanket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d299fd19-ac22-458a-8930-f3412d65523f/what_religion_believes_in_the_book_of_enoch.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_off0000ef0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0C 5236 bytes
SHA-256: edd8a19f15347bb4a16372f7e5a0e965eb8df9a60c99445211edbcd0a34ca096
font_01_sfnt_off000100be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BE 10248 bytes
SHA-256: b50c99ad91f7b0a52d3124eba2dbbacfd9012bc299fd116c9268d0e8f9daebe8