Malicious PDF — malware analysis report

Static analysis result for SHA-256 9340a818794dbf08…

MALICIOUS

PDF

80.5 KB Created: 2021-09-21 07:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e2f68867c86a4fd20bc074c0de7b8207 SHA-1: be06b9236bcd17380c4406a2bf9ae15f23c1c57b SHA-256: 9340a818794dbf08cf109abce5ff03d36d692903963a5434e15f263bad8e36fb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. Multiple external URIs are present, suggesting an attempt to redirect users to potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards a phishing or malware distribution vector, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pistant.ru/uplcv?utm_term=best+escape+room+games+iphone PDF link annotation
    • http://climacom.eu/userfiles/files/gipamipitokanulisid.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/xubikebunuvasazosud.pdfIn PDF document text
    • http://synergytaekwondo.com/click2buy_newp/userfiles/file/lanawabamatasir.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/narusidurudodujisurexosa.pdfIn PDF document text
    • http://monikaknoblochova.com/userfiles/file/wuzulatodikekobum.pdfIn PDF document text
    • http://veterina-naslunci.cz/userfiles/file/59875347550.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/luximulagerimokek.pdfIn PDF document text
    • http://teedinmaesai.com/user_img/file/82882432311.pdfIn PDF document text
    • http://montesantangelo.it/files/files/petizejupatolilodesiv.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/famukurewizun.pdfIn PDF document text
    • http://zzps.pl/userfiles/file/41419068240.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/83677841653.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/22538822273.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nululiribegilusaj.pdfIn PDF document text
    • https://gfwofficial.com/ck_imgs/files/9184839430.pdfIn PDF document text
    • http://dorapeyzaj.com/userfiles/file/wepepipakixisa.pdfIn PDF document text
    • http://thietbidienmpe.net/upload/files/meroxevegibise.pdfIn PDF document text
    • https://weishinclinic.com/uploads/files/202109032102024093.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/powosivilodijigisi.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/bopabefesodotuw.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD821 10828 bytes
SHA-256: 2a885fac7928cbc045e7c80fb07511bc985f11d7cb137ef7441b1b4bac5a2086
font_01_sfnt_off0000f0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FD 16880 bytes
SHA-256: 298e41af03611a61852bbb0a551fd7a55a28ec9e152574887d8110d62240d26f
font_02_sfnt_off00011c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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