Malicious PDF — malware analysis report

Static analysis result for SHA-256 14868e983c7d0a6b…

MALICIOUS

PDF

129.6 KB Created: 2021-04-29 22:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 25ab8479673aa8d9c27046d4d414993a SHA-1: 23409bc49b625a30daaf776f6682f12da3d05d59 SHA-256: 14868e983c7d0a6bc72f636ef909e4333155b9794310b66fe618099befb999b3
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to "Les Miserables" to entice clicks on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=les+miserables+by+victor+hugo+audiobook+with+text PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481852/normal_5feba86574327.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473926/normal_5fe81d10a82fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377936/normal_6024f98671fbe.pdfIn PDF document text
    • https://bupuvebawa.weebly.com/uploads/1/3/2/7/132740405/zekijowepa-dokiluvudunorom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389804/normal_5fc70d4f4849e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485822/normal_60319818f20dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446015/normal_5fd380bf8e383.pdfIn PDF document text
    • https://xuxomesepek.weebly.com/uploads/1/3/4/6/134681539/16df7f8c1d643e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369501/normal_601ead01afadf.pdfIn PDF document text
    • http://vozivovog.scienceontheweb.net/padaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449779/normal_5fe5d3a18c8b3.pdfIn PDF document text
    • https://vuzaruluweketex.weebly.com/uploads/1/3/4/4/134478477/7946305.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500186/normal_5ff4cd866ab67.pdfIn PDF document text
    • https://juxipidupe.weebly.com/uploads/1/3/4/6/134694928/gowodib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471971/normal_604d032c30d22.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://s3.amazonaws.com/dosalapasenow/69328778100.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/18031011507.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/55394389014.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/how_do_i_share_a_past_memory_on_facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/how_to_pair_suddenlink_remote_with_tv.pdfIn PDF document text
    • http://noratev.myartsonline.com/kupepitinogafidalokedajeg.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_off0001ae1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE1B 5596 bytes
SHA-256: 7c3a303c59175e627b9820ffb6861acbddfff411c9f4a85d3540a00e5a45bd6a
font_01_sfnt_off0001c134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C134 12696 bytes
SHA-256: 630e306148211aed48b7793a09589beb7198f75adc6866f98446219e24987dea
font_02_sfnt_off0001ea52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA52 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c