Malicious PDF — malware analysis report

Static analysis result for SHA-256 d141dd7d0c063aa4…

MALICIOUS

PDF

76.4 KB Created: 2021-04-27 01:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ea3bfe8b3293e350895297b899aa76b1 SHA-1: 595223a48f9bbeeb898a92ba247ad442682ad433 SHA-256: d141dd7d0c063aa4ab38abe5c649c2648c9f923483befbd8a693cc826ef3fb05
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 0.9995

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 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://mezovuduw.ru/strik?utm_term=synonyms+exercises+b1+pdf PDF link annotation
    • http://takovod.66ghz.com/holy_bible_amplified_version_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423462/normal_5ffcca014b7f0.pdfIn PDF document text
    • https://cdn.sqhk.co/bomaguvodar/iL5jb1X/zubuvijefovevunanagisexi.pdfIn PDF document text
    • https://cdn.sqhk.co/mudonisogub/eihgjgw/life_is_strange_complete_season_ps4_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415962/normal_6008bd67d5b0c.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/cQijpjf/amazon_kindle_paperwhite_2020.pdfIn PDF document text
    • http://kilagine.22web.org/conair_turbo_extreme_steam_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/xugavizira/cgfOmjb/tudegamidulitukilisazerup.pdfIn PDF document text
    • https://cdn.sqhk.co/molodomo/djijjiq/winubunotuda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449766/normal_6004bd97ac405.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tajazenu.rf.gd/lagu_bakuto_sengen_daigunder.pdfIn PDF document text
    • http://kemuvatixas.epizy.com/52811970829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/832c4797-4608-41df-9260-15edfefb4f47/53701132493.pdfIn PDF document text
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_e07c57b48f2747a4830c6399f9772a50.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/da905064-8836-4035-8bbd-eb1ba423366f/ordeal_by_cheque_short_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a2206ed-a632-469f-b489-53d38ccb5ac7/rca_rt2781hb_remote.pdfIn PDF document text
    • http://dunupilopun.epizy.com/6135987247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a84c69-e788-4ee5-9368-ea471002b867/how_to_put_a_tecumseh_carburetor_back_together.pdfIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_c731cb806d3e42d8982af1e40db4e0e4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d3588e-b7a4-4f3c-ab30-bac47f773506/44380756338.pdfIn PDF document text
    • https://3b1a0cff-dc54-4917-88c1-cdf904a8db56.filesusr.com/ugd/60aab8_e63a7657a4574dad8c36f47e3d8dd0f0.pdf?index=trueIn PDF document text
    • https://67dbe094-6b68-4a2c-870f-9bd980043d88.filesusr.com/ugd/cff74a_bed897c8f1ed449ba28a2d8e2fffeac1.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2B 5524 bytes
SHA-256: 27a3824ce65f12f02832aa32ea734f96097f82ed1b7e5a0fcf19894caba4f0c8
font_01_sfnt_off0000fef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF2 10832 bytes
SHA-256: 483a70e673e8a69a14a3667eba0e45c579a9b3a47573ae8b558c0ef4fe1e559c

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