Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3de4d1593f10d88…

MALICIOUS

PDF

74.9 KB Created: 2021-03-09 03:44:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1b722a48c39f15bb5ddb734ac44c118c SHA-1: 5656f74d16286bbc8079a5681fb03c49e610108b SHA-256: c3de4d1593f10d88c634017e50ae25aa704eeb59e9198389c5fce639c8dd2ad4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://seumenha.ru/123?utm_term=hd+movies++tamil+app PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4472198/normal_6017245d348e0.pdfIn PDF document text
    • https://lilugotowo.weebly.com/uploads/1/3/2/7/132711957/6922556.pdfIn PDF document text
    • https://cdn.sqhk.co/sumavevop/jdijahj/cyberpunk_co_op_campaign.pdfIn PDF document text
    • https://cdn.sqhk.co/guzorata/ThcjiRd/jakosatif.pdfIn PDF document text
    • https://fudegenajeno.weebly.com/uploads/1/3/4/5/134581691/kokasifajupetawul.pdfIn PDF document text
    • https://fusorebumobem.weebly.com/uploads/1/3/3/9/133986296/momulegulugunaw-jewimikel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370268/normal_5fde497c0b73b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fepujusarif.epizy.com/12757923823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df075045-1623-4446-a5a1-49884555a565/what_is_the_book_blue_like_jazz_about.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f8b09e0-4787-4639-836c-f559b3bcb857/acorde_de_piano_titanic.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/67212584339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d93eae90-604a-4ae8-976c-ceead91e8958/sony_dav-tz145_price_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/48464195370.pdfIn PDF document text
    • http://xedonufil.rf.gd/sakenamebakozema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db8de77f-f774-4801-b811-acfc6765ca36/50944907310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f511be09-60c9-493f-bac3-dd50513ac8e1/art_project_proposal.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/74928823115.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/how_bad_can_i_really_be_lyrics_lorax.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_off0000e6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EE 5028 bytes
SHA-256: 297a34973f207952c615349cc9f08d9196a05827066b3c709258086f48791ff3
font_01_sfnt_off0000f7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F9 10936 bytes
SHA-256: 76842ea9020ca07da3979f51a01a4e2992a608bf1b8770d1057043ac4cecb1fa

Open this report in the interactive analyzer, or submit your own file for analysis.