Malicious PDF — malware analysis report

Static analysis result for SHA-256 533d94ac38ed14f0…

MALICIOUS

PDF

70.9 KB Created: 2021-03-15 20:32:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7f0bfa97f558a42ef87c8489da603b19 SHA-1: 170673bdd4316cf30226cd492a36187c945934c3 SHA-256: 533d94ac38ed14f0879f10586659a0245e1c06cd8daec730c9a1a6d678679344
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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 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://golowaki.ru/wix?keyword=paul+revere%2527s+ride+worksheets+pdf PDF link annotation
    • https://xupijologa.weebly.com/uploads/1/3/5/3/135327862/naxiwixawaj.pdfIn PDF document text
    • http://gimagirep.iblogger.org/what_was_america_called_in_the_1600s.pdfIn PDF document text
    • http://xibomupazone.mypressonline.com/bismuth_subsalicylate_davis.pdfIn PDF document text
    • http://fotonagosuslugi-01.space/butatazusosesepulevexav7z9el.pdfIn PDF document text
    • http://itwow.info/bexeziselalodiribaxukanl6ke.pdfIn PDF document text
    • http://javosewo.sportsontheweb.net/91418498006.pdfIn PDF document text
    • http://jozarizotugi.22web.org/stand_by_me_spanish_lyrics_pitingo.pdfIn PDF document text
    • https://zipazoraxegav.weebly.com/uploads/1/3/4/3/134325660/64880ceac0eb.pdfIn PDF document text
    • http://fuvisetitisenon.mypressonline.com/30573714644.pdfIn PDF document text
    • https://biteledazuxol.weebly.com/uploads/1/3/4/3/134315761/rusapilimulujupila.pdfIn PDF document text
    • http://com-copyrighit.com/how_to_use_the_rowenta_handheld_steamerhbcl4.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://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_fee33f5c21914e57a18d3fedd89e7e12.pdf?index=trueIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_f44196bfa05b4759b65dfca77db41377.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/343f6a3d-a7a6-47be-b451-e39690e5d9a0/83727256655.pdfIn PDF document text
    • http://jevopuvejamiv.epizy.com/xawebojapuvelojej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e05a48c8-8fd6-47c3-aaae-3c8627f86c45/lolajupulejizid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ece8522-4a1e-4011-8420-ae2528778834/35796133040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58057ff5-6e9e-4b5d-9fcb-b182a9c2bc96/5468135172.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA4 5156 bytes
SHA-256: e527578a732bbd2c62bf41567858569c4af0f47bda294a4113482e43f9a3fe8a
font_01_sfnt_off0000dc5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5B 10440 bytes
SHA-256: 472766adde208119037deecb0f12868c3f7a817a224d4066bc5f27326ef4824b
font_02_sfnt_off00010019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10019 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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