Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae5d1abc3c498cf…

MALICIOUS

PDF

72.0 KB Created: 2021-05-26 01:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19a1adaf9fb812faf4bb57f430d6ceba SHA-1: 7aa2edb5924b5cdeb26ada357aa21a3df75ca886 SHA-256: 9ae5d1abc3c498cf093e71a4ec1d1877e903bdc16dadc6f876e2f535529f18d8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely intended to direct users to malicious content or phishing sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, and the presence of a URL pointing to 'dafemum.ru' further suggests malicious intent. The ML classifier and ClamAV detection strongly support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/strik?utm_term=mr.bean+animated+series+free+download+mp4
    • https://leduxuma.weebly.com/uploads/1/3/2/8/132814900/0c03c3948f4c0.pdf
    • https://cdn-cms.f-static.net/uploads/4457563/normal_6048ee9f5e4ac.pdf
    • https://kemoborinavimes.weebly.com/uploads/1/3/4/8/134874231/kubivame-bazediboma-wogituzowe-jexupijux.pdf
    • https://static.s123-cdn-static.com/uploads/4408190/normal_5fc8016233f18.pdf
    • https://cdn-cms.f-static.net/uploads/4495409/normal_604d323031161.pdf
    • https://cdn-cms.f-static.net/uploads/4415518/normal_5fdaabca28906.pdf
    • https://sakifawabepufa.weebly.com/uploads/1/3/4/4/134466371/01236de05409.pdf
    • https://cdn-cms.f-static.net/uploads/4381340/normal_6058997d72de0.pdf
    • https://velaliwud.weebly.com/uploads/1/3/4/6/134644949/pesupesutiva_notixiwim.pdf
    • https://static.s123-cdn-static.com/uploads/4490376/normal_5fefed140b95a.pdf
    • https://cdn-cms.f-static.net/uploads/4379720/normal_601a2dbd339e8.pdf
    • https://cdn-cms.f-static.net/uploads/4405902/normal_60514c97455fa.pdf
    • https://jetisinodab.weebly.com/uploads/1/3/5/3/135335938/5430215f9f065.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e0577431-28e2-482f-a5eb-eb357870d57f/what_is_wrong_with_southern_gospel_music.pdf
    • https://s3.amazonaws.com/begijufadi/67266460979.pdf
    • https://s3.amazonaws.com/xomepixo/olympus_om2n_rewind.pdf
    • https://uploads.strikinglycdn.com/files/2e7ff53b-3c55-49c2-8e25-92273ea713b2/whirlpool_cabrio_steam_dryer_not_drying.pdf
    • https://s3.amazonaws.com/kefodek/gudepomizazarasawafejedi.pdf
    • https://s3.amazonaws.com/somamere/absorption_spectroscopy_method.pdf
    • https://uploads.strikinglycdn.com/files/3c2bf417-ff76-4df2-b739-9256f8fb3573/34994088292.pdf
    • https://uploads.strikinglycdn.com/files/cb1ff1ae-1a81-4092-b5c5-5011abc9f772/retotojunatusixonilesogu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da88.bin
1d69470e4897805fa6f487b39f0dcf3b359a65d1d72dace06c3823502c3e71e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA88 5544 bytes
font_01_sfnt_off0000ed69.bin
588b3909742d8633f35117f70dd38515ba10ff6c0dca15dd655a21b6445f132d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED69 10916 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.