Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc1068c38a775cb8…

MALICIOUS

PDF

72.6 KB Created: 2021-02-15 23:16:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 63e5d01ea41e5b60dec3d9a4901dd672 SHA-1: 83e4066d0a86c31ba0c3dd3b2f09515b3e63f761 SHA-256: fc1068c38a775cb82ad2e64658c6385560222ae2fa9e8f8b41e538c846fef116
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the document is designed to host a large number of links, likely to redirect users to malicious sites.

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
  • 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://bologen.ru/123?utm_term=ionic+pro+90ip01mi01w+black+compact+ionic+air+purifier PDF link annotation
    • https://cdn.sqhk.co/rijomawonuj/iiehbMX/dining_table_set_ikea_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458838/normal_5fd61a19480df.pdfIn PDF document text
    • http://botojagi.iblogger.org/8829937622.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386330/normal_5fc8726c981e6.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/f4Fhagh/sago_mini_super_juice_apk.pdfIn PDF document text
    • https://gabusuve.weebly.com/uploads/1/3/5/2/135297202/lalijovuwifaw.pdfIn PDF document text
    • https://fetevemukimagon.weebly.com/uploads/1/3/4/8/134896640/46820a.pdfIn PDF document text
    • https://jinunezig.weebly.com/uploads/1/3/4/3/134308797/1240273.pdfIn PDF document text
    • https://lirejodeju.weebly.com/uploads/1/3/4/6/134628820/linudovinabibujugajo.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/45889740735uiota.pdfIn PDF document text
    • http://copyright-rules-help.com/pulmonary_embolism_guidelines_2016_chesttx3xb.pdfIn PDF document text
    • http://specialsale.info/96117327545pm4dc.pdfIn PDF document text
    • http://fizadote.22web.org/xijejudexisazilenoxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xofawuriduk.epizy.com/80925500730.pdfIn PDF document text
    • http://betizig.epizy.com/94228297519.pdfIn PDF document text
    • http://kesaratesur.epizy.com/birth_horoscope_in_tamil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF1 5448 bytes
SHA-256: d92fc6c7042f93215f63f387884d80f6ad8fdb562dfea0d706c12b262a936d71
font_01_sfnt_off0000e06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06F 10596 bytes
SHA-256: ecc3142625c0aa7aae68c70a4cf6cf5a38ceaeb7538ae6a1122c6a028412b191
font_02_sfnt_off000104a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A8 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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