Malicious PDF — malware analysis report

Static analysis result for SHA-256 82218918253e1230…

MALICIOUS

PDF

82.0 KB Created: 2021-04-04 20:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6719cddd2ec2894b6d89e8ffb49c0548 SHA-1: e74ed6a656c5df1c289480626e11948dddd7ef07 SHA-256: 82218918253e12307287898b6c08a30e415a0c3021bf142b2487c3640e815d9e
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 0.9996

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://lozipotod.ru/wix?keyword=dehydration+synthesis+gizmo+answers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452626/normal_60661580cfa4f.pdfIn PDF document text
    • https://jefanumu.weebly.com/uploads/1/3/4/8/134889008/a8bef9d41d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465537/normal_5fc9757321240.pdfIn PDF document text
    • https://musazulawikale.weebly.com/uploads/1/3/5/3/135305526/wezirolusifex.pdfIn PDF document text
    • https://jonomivebotuw.weebly.com/uploads/1/3/4/6/134683751/bevamew_kitadani.pdfIn PDF document text
    • http://vedojuburokag.22web.org/modern_architecture_book.pdfIn PDF document text
    • http://jugadeguxapit.iblogger.org/buzajosepurokugasilid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444882/normal_603890288febc.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/japelokafijarokotulepuxi.pdfIn PDF document text
    • http://dupuladusudired.mypressonline.com/sequential_spelling_placement_test.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385850/normal_60032c416f371.pdfIn PDF document text
    • http://famexukox.22web.org/59156169252.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/wilonenilob.pdfIn PDF document text
    • https://tanafojapazikop.weebly.com/uploads/1/3/4/5/134576724/1345558.pdfIn PDF document text
    • https://betepojikimiji.weebly.com/uploads/1/3/0/8/130874485/misuxorezudipo_junitira_watutezuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405642/normal_5ff05b89a387f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuzudaru.epizy.com/44805560575.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/2043136258.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/97710556253.pdfIn PDF document text
    • http://juliwefumekabe.rf.gd/compressing_file_size_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/zalizurivaxowarebopip.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_off00010283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10283 5668 bytes
SHA-256: d158c1bdb2f4548746ba20073d8968d807f42a1b0ee1d7dfab71db996aa7a637
font_01_sfnt_off000115c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C9 10616 bytes
SHA-256: bd0484c850d54f50526a6390859bbdd3db7d9695d82da6d9257f4db8186658f5

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