Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d440b25fe0952a4…

MALICIOUS

PDF

69.7 KB Created: 2021-01-23 05:55:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6db3b9c7ad14088176d4f6d7d09a8e2c SHA-1: 98d3f9e0077da49ccfce1d860a4743f41a79b840 SHA-256: 2d440b25fe0952a41bedfd6ce451ae91071693722bc36d3db413023872c10b17
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to disposable hosting and are likely used for phishing or to redirect to malicious content. The document body, though heavily obfuscated, suggests a lure related to 'Audience report social media'. The presence of multiple external URIs and the link farm heuristic indicate a strong intent to direct users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://traffset.ru/aws?utm_term=audience+report+social+media PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370560/normal_5fc92577eef96.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/jjInih9/racing_center_warsaw_pozar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412151/normal_600b6cfa4af94.pdfIn PDF document text
    • https://topalezomezo.weebly.com/uploads/1/3/4/3/134305389/mutazofoje.pdfIn PDF document text
    • http://kuroramogesok.iblogger.org/agrarian_skies_2_server.pdfIn PDF document text
    • http://rijupoxog.22web.org/acura_rsx_2004_manual.pdfIn PDF document text
    • https://nagiliju.weebly.com/uploads/1/3/1/4/131412426/6116396.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/ghbJheI/rugby_capsaicin_cream_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/majatuto/MPIJgho/vmware_workspace_one_intelligent_hub_privacy.pdfIn PDF document text
    • https://gizajosusu.weebly.com/uploads/1/3/1/8/131856374/dopisewabuzume-guzixolovez-xarotiri-vemopus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377674/normal_5fd84c0ed071e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476294/normal_5fd672b60238c.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://s3.amazonaws.com/tabobujimo/dekunanoveguxixuketak.pdfIn PDF document text
    • http://jufosuliz.epizy.com/chandni_chowk_to_china_movie_openload.pdfIn PDF document text
    • http://zazisuj.epizy.com/98459745703.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/furirajilefenikiwoxolun.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_off0000c8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F9 5088 bytes
SHA-256: 0a288254a68daa9899172f796e184d3221a1f2a926c6bbaa31f966627cb4ca9e
font_01_sfnt_off0000da19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA19 9812 bytes
SHA-256: f78688aee98a8ad2b6800576dd37833bee87704fa29c29bc5d7cd8031dc7ae8f
font_02_sfnt_off0000fb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB91 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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