Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1d4b8c1fb16ad2…

MALICIOUS

PDF

75.0 KB Created: 2021-03-08 05:54:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 72dc8138a8a0d6198620f95be2912587 SHA-1: 60041e156fccd794256666f6301850538682b1af SHA-256: 9c1d4b8c1fb16ad242a17e96cbcfa00c6e93411fc0241472301cfceec685212a
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a malicious redirector link and a PDF link farm. The embedded URLs suggest an attempt to redirect users to potentially harmful sites, possibly for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to direct users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=the+monkey+king+3+2018 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4412387/normal_5ff59493706b7.pdfIn PDF document text
    • https://zisifogadudup.weebly.com/uploads/1/3/4/7/134765868/3217536.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/ja4ruaH/57284055340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485457/normal_602cf37ebe892.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/iWijAif/drag_racing_3d_offline_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403537/normal_6002b5639cea9.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/ijigvhi/23851372420.pdfIn PDF document text
    • https://cdn.sqhk.co/sojejinof/fhhc4hh/superhero_mods_for_minecraft.pdfIn PDF document text
    • https://daguvosiliwu.weebly.com/uploads/1/3/1/4/131406153/4bf6fa73b9.pdfIn PDF document text
    • https://bisetegu.weebly.com/uploads/1/3/4/5/134528498/b993e62.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/itjbMjd/capitalism_in_a_sentence.pdfIn PDF document text
    • https://cdn.sqhk.co/nomowaxiwo/dG5g2ie/19931743193.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/EjjMejc/grist_definition_synonyms.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/7b4909df-cddd-44d7-bc98-9ed3d9fb58ae/hl-l2360d_reset_drum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a75f3a-3861-4c25-9892-9be5065926dd/small_german_shepherd_dog_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c959d56c-2493-48c5-8ab9-ece2552cbb76/spalding_nba_44_polycarbonate_portable_basketball_hoop_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee5e0def-7a74-4ea5-b17a-ec7c669bcf27/what_does_cross_section_mean_in_politics.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_off0000e953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE953 5384 bytes
SHA-256: 3ec93a6d21f96bd267f73e42c4e37877c9f782e562fd7285c31a651b5ff720e9
font_01_sfnt_off0000fb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9F 10408 bytes
SHA-256: 7bd74032fc08a77c781b26c28c955825eb2c3784e7b6f27bfa89c9fbb6ad905a

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