Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ab899f47df5e608…

MALICIOUS

PDF

68.5 KB Created: 2020-12-22 14:36:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 3747ac309ab7ed86088371b92e08e243 SHA-1: 77fdd39a69a4fbe48bb8fc952c87e2e2773ee3f5 SHA-256: 1ab899f47df5e60831ed0283d935ba90933745281e9779ff0a05a127d4357497
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings reveal it contains a large number of external links, suggesting it's part of an SEO spam or phishing campaign. The embedded URLs point to various PDF files, likely intended to redirect users to malicious content or further phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://trafftec.ru/aws?utm_term=my+solace+alanea+alder+pdf PDF link annotation
    • https://fomimixa.weebly.com/uploads/1/3/4/7/134775862/ropofipezef-gusadizenujune.pdfIn PDF document text
    • https://judixanasagik.weebly.com/uploads/1/3/4/6/134688655/e1c2edc131eef.pdfIn PDF document text
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/6375491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392457/normal_5f90ec6ae59a9.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
    • https://s3.amazonaws.com/tikofaketonub/gajep.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/darukedumelujuka.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/72422900246.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/kafupimazunafo.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/78333870588.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/saxawidaka.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/77784028413.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/woponugenogifu.pdfIn PDF document text
    • https://www.amazon.com/dp/B07P9BG7VCIn PDF document text
    • https://www.amazon.co.uk/dp/B07P9BG7VCIn 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_off0000c1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E1 4916 bytes
SHA-256: 3ded1e360702f4c6cdc29fe293f6d37104086dcab1ace044a886274726cb5ffc
font_01_sfnt_off0000d2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A6 10832 bytes
SHA-256: 162fea0bd8f15e39b0b4ed850cff8cfc1ba91854c5df8ed776dc4dd51bd40c70
font_02_sfnt_off0000f76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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