Malicious PDF — malware analysis report

Static analysis result for SHA-256 320f9af053525665…

MALICIOUS

PDF

73.5 KB Created: 2021-05-16 08:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b782c92f07224fb53e630368b9fd9b1c SHA-1: c6015b4ac0c626f8ecba0f5751c247402a64416c SHA-256: 320f9af053525665b4453a94ba5c5b019c52a9519f2d60a449722c85029d7f6e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9999

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/strik?utm_term=philips+respironics+remstar+pro+c-flex+plus+manual PDF link annotation
    • https://gazukevofuw.weebly.com/uploads/1/3/4/5/134597640/siguvojazolenar.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/fipepumimovedusulud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485451/normal_60571e76ac5c4.pdfIn PDF document text
    • http://1gusevshop.space/56442405308ir7gj.pdfIn PDF document text
    • https://nalirukixew.weebly.com/uploads/1/3/0/9/130969663/xirizogekelun.pdfIn PDF document text
    • https://zugufirit.weebly.com/uploads/1/3/1/1/131163535/jabaz.pdfIn PDF document text
    • http://barbanapoli.moscow/kagidiwtpap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450353/normal_6041e0cd29ecd.pdfIn PDF document text
    • https://piximemob.weebly.com/uploads/1/3/4/3/134371032/vulukaja.pdfIn PDF document text
    • https://fajesafopumusid.weebly.com/uploads/1/3/1/8/131871419/linipevagaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://21dbc830-6d60-48ad-8ab0-00d2b3cb69e0.filesusr.com/ugd/18d949_1f16e7982b2d491f8854f32b17bed8db.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/62d6fdf5-1a4b-4bff-a317-47fc7438f39d/lexus_is_350_f_sport_2021_specs.pdfIn PDF document text
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_05c0405d999e44558f3de6d48ff50d88.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/15b9957c-54a1-4d68-93a6-3fb62a40b07e/computer_science_distilled_reddit.pdfIn PDF document text
    • https://9cc02d22-446e-415d-9686-6e49aadcb3b3.filesusr.com/ugd/aa6a08_2867575f1ed9482690c00126dca92ae0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f351187-0c33-4148-b4ce-b4f05454ae8e/what_is_the_best_home_burglar_alarm_system.pdfIn PDF document text
    • https://068ba8bc-08b0-4b68-8151-f3c59c7a5775.filesusr.com/ugd/5a4aad_dcc7207b068c437d8a2352620d7cb1e3.pdf?index=trueIn PDF document text
    • http://bebovufuvuji.myartsonline.com/whats_the_difference_between_plot_and_story.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F7 5356 bytes
SHA-256: 98f18eac27d28f853f2370a17748f3e9d284e5521364c213486e44262a46d063
font_01_sfnt_off0000f30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30E 11008 bytes
SHA-256: 19569619ad91f10dd560c8a69e7659ea77206e3ffb6cff0cc3df6403467d720d

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