Malicious PDF — malware analysis report

Static analysis result for SHA-256 d714adc178d3212b…

MALICIOUS

PDF

77.9 KB Created: 2021-03-31 21:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: cc5283fe166993ccd29c6c3078bdc884 SHA-1: b027ce9bade70c76395a13a89de694508f5aa8e4 SHA-256: d714adc178d3212b78fd96583c4e74a978db4f18abe2244d710b4878fa38eb22
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified as a link farm. The primary URL, https://ponafet.ru/award?keyword=information+security+risk+assessment+pdf, suggests a lure related to security assessments. The presence of a ClamAV detection for Pdf.Phishing.Trojan and a high ML classifier score indicate malicious intent. The document likely serves to redirect users to a network of other sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/award?keyword=information+security+risk+assessment+pdf PDF link annotation
    • https://cdn.sqhk.co/sukurorezib/Fjjic18/95301212650.pdfIn PDF document text
    • https://zatenumidepav.weebly.com/uploads/1/3/0/7/130776458/807398.pdfIn PDF document text
    • https://zetojaxonafavop.weebly.com/uploads/1/3/5/3/135309172/dadives_fuvofobogo_busejolujaraf.pdfIn PDF document text
    • https://cdn.sqhk.co/kusewupudin/hbjhxjc/15709972681.pdfIn PDF document text
    • https://rasazumeg.weebly.com/uploads/1/3/1/4/131454762/b3b80e14bb28.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/jbjfiif/92270963824.pdfIn PDF document text
    • https://dezilitew.weebly.com/uploads/1/3/4/7/134728488/fapabuk.pdfIn PDF document text
    • https://lobigemef.weebly.com/uploads/1/3/2/3/132303116/ruwunemuf.pdfIn PDF document text
    • https://rovibabewovel.weebly.com/uploads/1/3/4/8/134884015/pubamowagin_lopavorakagetow_resagizipiv.pdfIn PDF document text
    • http://bonifacy.site/breather_in_transformertdwyq.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/gNTgihj/45013656562.pdfIn PDF document text
    • http://fosipuzo.mypressonline.com/9148268852.pdfIn PDF document text
    • https://cdn.sqhk.co/zunezafi/cgchchc/13306968787.pdfIn PDF document text
    • http://reawont.online/how_to_deal_with_resistance_to_change_in_an_organization3k6vx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nafaradevofipaf.myartsonline.com/67087613530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c8d226b-2533-4d2d-870a-7d537996853b/what_does_safe_haven_stand_for.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a977e1d-83d2-439a-ac3f-d98f6ba9aa59/what_words_begin_with_ox.pdfIn PDF document text
    • http://pikaderobiw.atwebpages.com/calculus_b_v_ramana.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_off0000f227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF227 5372 bytes
SHA-256: fc13ad5ff0c3954fe708b5f8aa8f1de1f09d761dd335d5f00a80f471f038e415
font_01_sfnt_off00010463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10463 11120 bytes
SHA-256: 188151e9ddee18d08ab2f4828bea4eeeef53fb3252082e54ff904ef4ca17b9b5

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