Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3890bfca943ca4f…

MALICIOUS

PDF

82.1 KB Created: 2021-03-11 00:57:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: d9621d7db26dcd315bf850cb0504e4b2 SHA-1: 3b1f2268f27094fb4a2e98b887235d16960a0ee6 SHA-256: d3890bfca943ca4f30753439a12d7f2a94215124c2e4e61409e8bce1a10eb94f
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains references to 'wow classic alchemy guide icy veins', likely a lure to attract users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=wow+classic+alchemy+guide+icy+veins PDF link annotation
    • http://xiwupulo.medianewsonline.com/vabowafa.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/zuzivogimi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387581/normal_5fc99954cb6fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403414/normal_600cf46eb244f.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/are_chocolate_dapple_dachshunds_rare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411231/normal_602bb068266ea.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/67050447693.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/safety_in_everyday_life.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475737/normal_5ff68cb9171fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418777/normal_602747eda279e.pdfIn PDF document text
    • http://vumamanepu.sportsontheweb.net/the_road_not_taken_summary_stanza_by_stanza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e071b58-4359-4b3d-a662-0a2eea11c0c1/saga_rules_review.pdfIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_70f623d1608b4c1ab54da4027e0243a1.pdf?index=trueIn PDF document text
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_8f7a15fc18114b3198933b9bf61882ea.pdf?index=trueIn PDF document text
    • http://fadudenomo.onlinewebshop.net/85929078089.pdfIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_43568187c426446b8f5e1606a8275417.pdf?index=trueIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_9257c223379d4266a0289e88f1047f43.pdf?index=trueIn PDF document text
    • https://28a90398-13b1-4b58-b54c-ed045a6bddf2.filesusr.com/ugd/7e9e1f_ca7372ca8e814dc3b988605e55d18b8c.pdf?index=trueIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_5a4150d4c02348b5b1ce363a9332cddd.pdf?index=trueIn PDF document text
    • http://wugujub.onlinewebshop.net/20852882450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/731904a8-9bfa-423f-837e-1a4543dee235/how_to_use_a_single_use_keurig.pdfIn PDF document text
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_fa7a8cbf6a4243559fb23b37253cccd9.pdf?index=trueIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_0b5793bb8b184c0c9d8fc751aef7deb1.pdf?index=trueIn 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_off00010463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10463 5524 bytes
SHA-256: 03ddfb0577d28f8640c5f64b16bbc5f48b09cc41b0bf7cb63158ac569e4be11a
font_01_sfnt_off00011728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11728 10420 bytes
SHA-256: f14e9dbe79cc936dbc860b9a0e566cf1cdbea019ac4d9ef9952efa7c7a1d205b