Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d2957f09aedeb7…

MALICIOUS

PDF

84.5 KB Created: 2021-05-21 07:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: fadc0691193e149d5a944fe4a8c9d903 SHA-1: 2701d866eb661077a310a3982653dc57882189da SHA-256: a0d2957f09aedeb747b3f661ecc50ab8ab186f6a1d5436080490023244a1b87c
194 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many of which point to disposable hosting services, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, contains text related to downloading software, which serves as a lure to encourage clicks on these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/strik?utm_term=how+to+download+carx+drift+racing+on+xbox+one PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462066/normal_5fe7f7c452552.pdfIn PDF document text
    • https://rulodewarozuw.weebly.com/uploads/1/3/4/6/134678260/98c7811c4c0.pdfIn PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/eac10584fad70b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416791/normal_603d2b22b9120.pdfIn PDF document text
    • https://datokusowijodo.weebly.com/uploads/1/3/0/7/130776434/gamijonobemiwa-lazupilan-guzotowavitevig-lenejugewa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489725/normal_60436b888bd77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499651/normal_605f87063861b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366036/normal_5fe0b9484b50a.pdfIn PDF document text
    • https://nogusevufofe.weebly.com/uploads/1/3/4/5/134525370/424ca97db5cc08b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417306/normal_5fc8eaef11629.pdfIn PDF document text
    • https://bobilemako.weebly.com/uploads/1/3/4/7/134733435/poxugumusilodijolu.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/1afd1154-6cab-44f8-bc04-9f12d7833289/convert_amazon_kindle_to_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f54b145-be76-4e3f-acce-f4616dc3b71a/7566072241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/898a9d63-cd94-414f-a0cd-a8930dfdb4f0/como_es_liderazgo_transaccional.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f07be53-4086-429d-ada9-5d6a9358123d/77209714855.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/accounting_period_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ec7ecd4-a443-4d61-ba75-52d0c50f8348/xavovogosofug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eaafd66-678d-4f49-9443-de4a128e4169/john_deere_l130_wiring_schematics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4261431-987f-4856-81c3-7d888871464c/reading_the_bible_in_chronological_order_in_90_days.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/pl_sql_learning_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/what_are_ethical_issues_in_psychological_research.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCA 5272 bytes
SHA-256: ac947d9eebdae8de2f239c906a555d4968591cb8b45bef67d7f07790488d2a9b
font_01_sfnt_off000101dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DC 13156 bytes
SHA-256: cddca47a8a2450371741914452bdf160c8e50f4f635a6cb9ecd64eed1600d203
font_02_sfnt_off00012d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D75 16136 bytes
SHA-256: e062faff0b5f3d12ef96d17a813e209689a07cec8984531399442ab350abe39b