Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a8187d82921b12…

MALICIOUS

PDF

81.7 KB Created: 2021-03-21 20:48:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 09f3fe233afb5c111cbcb74808c2cb9b SHA-1: e9bbc3b73939ebb3a55daf7f2daf6709b73da5f5 SHA-256: 52a8187d82921b1287b732d6ff85cb5b9c96b75a71f048986eafa8290872072e
126 Risk Score

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 0.9998

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://nipisod.ru/123?utm_term=blended+2014+full+movie PDF link annotation
    • http://vumekakemimux.iblogger.org/aws_ec2_cloudformation_launch_template.pdfIn PDF document text
    • http://shop-profildoors.ru/what_is_a_jewish_relationship_with_yahwehiq97l.pdfIn PDF document text
    • http://wordsidepost.top/47597717509ktf4w.pdfIn PDF document text
    • http://fonomujolatuv.22web.org/ccie_and_ccde_evolving_technologies_study_guide.pdfIn PDF document text
    • http://yewes.space/nevokihn087.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jokosalona.epizy.com/sugaxewezelosuduniluj.pdfIn PDF document text
    • http://vofegut.epizy.com/pagafi.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/siriusxm-ssv7v1_stratus_7_satellite_radio_with_vehicle_kit.pdfIn PDF document text
    • http://lulojoduvos.epizy.com/95801362250.pdfIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_3354ecea60024d0688e4b8c6509915e7.pdf?index=trueIn PDF document text
    • http://bexasagusive.rf.gd/tissot_t-touch_connect_solar_uk.pdfIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_0cc1cb61c09d48c18ce000f2c4a4d500.pdf?index=trueIn PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_430a4133b9f447039e2f4978c7cf6ef6.pdf?index=trueIn PDF document text
    • http://jawuguv.epizy.com/allah_hu_akbar_wallpaper.pdfIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_209777d1f3cb4c76aa8e704f7c677946.pdf?index=trueIn PDF document text
    • http://vutilunero.rf.gd/78874716688.pdfIn PDF document text
    • https://ae40ec61-d20a-40a8-9c94-208d4569f534.filesusr.com/ugd/5d0862_1098e2cd7abe422baa1c516f2a37c52a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/garmin_nuvicam_lmt_gps_with_built_in_dash_cam.pdfIn PDF document text
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_c329a6d0ecc44c9f82e7fc050db67bee.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

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_off00010233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10233 5092 bytes
SHA-256: e7e9b033942c2bef90f12163323761471c076b9db5b8599842626aac4eb7c1c3
font_01_sfnt_off00011395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11395 11292 bytes
SHA-256: 8befea52abbc9f24cbadde2e44b6918b7c896fcdf2426795e4342a76b9983f6a

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