Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a323dde64fb807…

MALICIOUS

PDF

71.1 KB Created: 2020-12-23 04:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d167f8fb283cdc85806e81db38820022 SHA-1: 9e3a61638f4478a3fcb3171d3a00e27accb3b27c SHA-256: 42a323dde64fb80791641292c0122c04a4493a89ac0579ac90205f578382fcb3
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and point to known malicious redirector infrastructure. The heuristic firings indicate this PDF is part of a link farm designed to direct users to malicious content. Although no scripts were explicitly extracted, the nature of the links and the ML classification suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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.
  • 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://ggtraff.ru/123?utm_term=my+health+an+outcomes+approach+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389805/normal_5faffc0bd0d29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370052/normal_5f97a61571768.pdfIn PDF document text
    • https://dixugoruvaweg.weebly.com/uploads/1/3/4/6/134616472/pewuwo-palut-pogusuvan-xobipomik.pdfIn PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/48ff2277d.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/xileteb-filimomixogolag-goguvigadixi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482215/normal_5fb289e0ea0f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4526930/normal_5fe287fc7904c.pdfIn PDF document text
    • https://xizidalubatud.weebly.com/uploads/1/3/4/5/134583516/wepebesaloripuludawu.pdfIn PDF document text
    • https://mamonesobekemi.weebly.com/uploads/1/3/4/3/134320903/1927688.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/0f5e5c56-e124-454b-9460-6bf63cd81e2d/robiso.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/89047643471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/809c16dc-b493-4caf-b729-4c5ece001748/1020389591.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/8151794948.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/android_software_7._0.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD791 5500 bytes
SHA-256: 0b568c55d262ace1a0be0d5e913e5779485b7268ef7c4d7373586fb36eed3ca8
font_01_sfnt_off0000ea30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA30 11036 bytes
SHA-256: a7b7818cc942c42e81de7d43fad9a26fa443189671072abd12c8e5fdff2ce182

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