Malicious PDF — malware analysis report

Static analysis result for SHA-256 a992107f9d400532…

MALICIOUS

PDF

76.4 KB Created: 2021-03-23 15:45:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 72ff43106c07a0e46a787695b8d58855 SHA-1: 57cff1a3f65bb43d002f0b56b08e3c352e22d240 SHA-256: a992107f9d4005328e22fcc380c203665bc02d5768138b9a440e99f68bd5346c
156 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 0.9995

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://xezojetit.ru/award?keyword=brooklyn+college+majors+pdf PDF link annotation
    • https://degewobajobazim.weebly.com/uploads/1/3/5/3/135324790/6698944.pdfIn PDF document text
    • http://xsale.trade/presto_pressure_canner_replacement_sealvkolk.pdfIn PDF document text
    • http://nanolenka.xyz/38666049133l94e5.pdfIn PDF document text
    • https://rikodagipavas.weebly.com/uploads/1/3/4/3/134334006/moberosuzawe.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/dfecf.pdfIn PDF document text
    • https://zekasujiminog.weebly.com/uploads/1/3/4/3/134366003/lapumolisanelobejeb.pdfIn PDF document text
    • http://salea.site/tevekaxapodogobinumuzarzjb.pdfIn PDF document text
    • http://emirofficialzm.com/honda_pilot_service_code_b135e3fbg.pdfIn PDF document text
    • http://instapriz.website/osrs_dark_totem_basemg90z.pdfIn PDF document text
    • http://ewwe.space/huemul_circuit_without_guidehak0q.pdfIn PDF document text
    • http://fb-ig-violation.com/61593976584jfz6x.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/6d362a59-edf0-4c74-a97d-09bea45bf866/vizio_vw26l_stand.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/21666170682.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/lelezedukoduwuturokip.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/bootstrap_form_validation_ajax_submit.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/46836743207.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/gupigi.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/kavuwufipigigimudexikulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e7c32b8-22de-451c-8ecb-483c4988f23c/bovaritisepeni.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/the_willpower_instinct_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d849dd40-3563-4069-83bf-80d60ff74eb9/17_hp_kawasaki_engine_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/gejop.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_off0000ec8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8D 5764 bytes
SHA-256: 15ddc0d82612e6841ff0b658e49ffa139fb5550c684b521fb4dfac3f6cad96d1
font_01_sfnt_off00010033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10033 11232 bytes
SHA-256: 988f2d355973007b10a973bf7fcc37e5763ef13b399384fe6a143eca63b05c27

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