Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eee5676e217c901…

MALICIOUS

PDF

81.1 KB Created: 2021-05-18 13:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e972b76c115531fa1564320955f6eeb9 SHA-1: c9858e8c125ae609e83281b94c4a17c205d45449 SHA-256: 1eee5676e217c901efbbc38c03d9e796aa29ca0999b2a67c6e56f4a200d82b31
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document contains a link farm with numerous external URLs, including one pointing to 'bologen.ru' with a query parameter suggesting a download lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/strik?utm_term=itransmission+download+ios+12.4 PDF link annotation
    • https://wobajaxeme.weebly.com/uploads/1/3/4/3/134350369/cc82b8.pdfIn PDF document text
    • https://pomavedakese.weebly.com/uploads/1/3/1/8/131871772/828bcd5b537147a.pdfIn PDF document text
    • https://nigapabibaba.weebly.com/uploads/1/3/4/9/134903053/0b99d78aaa3fdd.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/tunuvinetisigateb.pdfIn PDF document text
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/ad0884ec01ca17.pdfIn PDF document text
    • https://letemoxitaja.weebly.com/uploads/1/3/4/4/134475957/dujap-rividesa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393209/normal_6025f2a505ade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411270/normal_60598d6895a5e.pdfIn PDF document text
    • https://xilasofuvi.weebly.com/uploads/1/3/4/6/134651230/78a386c9.pdfIn PDF document text
    • https://jitolubupiloz.weebly.com/uploads/1/3/4/6/134637312/sudumisux-vovimidosigime-sejixogazubat.pdfIn PDF document text
    • https://guwawafike.weebly.com/uploads/1/3/5/3/135338161/3501025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447631/normal_602200e76e1cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450723/normal_5fd059b47c71a.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://uploads.strikinglycdn.com/files/0f4a623a-0c38-4b5b-af3f-24fb27e11eaa/virgil_aeneid_book_2_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8221dcd1-baff-470b-8b86-1277e42d485c/99798183152.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/2211975948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daf9b595-d5c4-4158-8a58-c29663d1bc4e/jorezitimikamurudivuduji.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/xutikevug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/239584e1-1921-4d39-9d55-bec25b1a5322/audiolibro_el_alquimista_con_mariano_osorio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/846b80a6-56c8-4bd3-aa19-8bb5ba6f0031/sharp_microwave_drawer.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/cardiopulmonary_physiotherapy_assessment_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd86cb57-6037-4a50-aa3a-f90d58b5bbe8/jativixazomuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc453e4f-ff54-4d29-bea8-b105207c463e/garmin_gpsmap_64s_price_in_malaysia.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_off0000f436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF436 4976 bytes
SHA-256: 5fc6419e54f74cbc3059c36a2ad7e2ea9ac86895d14cb410a297627eff32d552
font_01_sfnt_off0001050b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050B 10384 bytes
SHA-256: 1af380b026a3d66abc33deb3482a1a2773336c2bd66a84e01fcaed518c5a79c2
font_02_sfnt_off00012892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12892 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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