Malicious PDF — malware analysis report

Static analysis result for SHA-256 176a0f722b272bbb…

MALICIOUS

PDF

66.7 KB Created: 2021-03-23 22:24:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4b6f851eccc72bbfe60b2c0c202bf550 SHA-1: 96c24dfd4eb5f83bdcfbbc6c9062ccb8ff66455b SHA-256: 176a0f722b272bbb67d908f689e7e977ab984317d58a8a999cef931ac06196f1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs and is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or a trojan. The document body, though heavily obfuscated, contains keywords related to a concert cancellation, which is likely a lure.

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://jottigo.ru/wix?keyword=elton+john+columbia+sc+cancelled PDF link annotation
    • https://fibobamoga.weebly.com/uploads/1/3/1/6/131607866/0fac6cb2be3af58.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/pizudexafo.pdfIn PDF document text
    • https://fosogizubosa.weebly.com/uploads/1/3/1/6/131637108/a26f61d.pdfIn PDF document text
    • http://tiwenol.iblogger.org/english_grammar_checker_pro_apk.pdfIn PDF document text
    • https://fowidejufato.weebly.com/uploads/1/3/4/5/134582967/81da1.pdfIn PDF document text
    • http://nepojar.22web.org/leveling_mining_classic_wow_guide.pdfIn PDF document text
    • https://tetavezodumop.weebly.com/uploads/1/3/4/6/134645623/buvawam_nudoreku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486963/normal_6005b91080134.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452587/normal_6001c7afbf8ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_1308992af22b42f6a1704226f5319dfd.pdf?index=trueIn PDF document text
    • https://f1e11ea9-a931-46ad-af30-391325c877dd.filesusr.com/ugd/423518_a1b37d1adf9a448ca1edc6f0a91d5d33.pdf?index=trueIn PDF document text
    • http://xilomorovet.epizy.com/tozipogazijaduti.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/nanajuwefidevivixebaka.pdfIn PDF document text
    • http://dusameferadulo.onlinewebshop.net/fipovigedasozinurid.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_off0000c724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC724 5256 bytes
SHA-256: dd6cda7832868ce6498b42769246405a97c00c852179f578db7dab435fc59f32
font_01_sfnt_off0000d8de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DE 10964 bytes
SHA-256: 8d5bff0382b74916e5aacb85055405522a85a69d6be0ae8486004ac50733ac3b

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