Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda6db7a24af0670…

MALICIOUS

PDF

75.1 KB Created: 2021-04-14 03:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3aaf9a64d7ac5b7ab4ba2fac4fafaf62 SHA-1: d7dacf8c3e2f20a47077b4c0cf175947505d47fc SHA-256: eda6db7a24af06709ab429fb35e98d2f9cc919ce9022ec8cbfe81bdf4b01eb1e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

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://lozipotod.ru/strik?utm_term=how+to+day+trade+for+a+living+pdf+free PDF link annotation
    • http://grantmedica.ru/how_to_make_your_own_jarvis_softwarech5e2.pdfIn PDF document text
    • http://rozewevojalel.sportsontheweb.net/astral_travel_free.pdfIn PDF document text
    • https://gumosoxegobekij.weebly.com/uploads/1/3/3/9/133999275/voganuzige_betudukev.pdfIn PDF document text
    • http://afracheat9.xyz/senowiwudirae3vbm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421329/normal_5fe2a88623ee2.pdfIn PDF document text
    • https://kakituku.weebly.com/uploads/1/3/4/5/134589995/7dca28ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449965/normal_604baa0e630ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bokepomi.onlinewebshop.net/naseraxebaweduzapixoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beb52328-920b-4fdb-a42d-c6edbc9c58c1/kuluxofinujina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b2c776-44f0-420e-abf5-338fc44f0fd5/american_gods_free_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32bbf043-6341-4877-aee4-86745401dc5c/washington_football_team_helmet_logo_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69b322af-7cb2-4762-8b48-5e63cb69200a/chocolate_and_cream_dapple_long_haired_dachshund.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51676441-02f5-49dc-bfc5-6a26f46ee4e0/what_does_hanegraaff_mean_by_forbidden_knowledge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4fa9405-1b4a-4e6d-8f9b-66e706e0f19c/the_success_principles_by_jack_canfield_audiobook.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_off0000e72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72A 5248 bytes
SHA-256: 2c5e89e773a858849a725f02b957d58c92de2231c3095724d80f4c8b8841cb43
font_01_sfnt_off0000f939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF939 11280 bytes
SHA-256: 3e6f8cb014b1e9ee8430cf31fdd6754e4f52751489595ad0479b0100d9c91535

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