Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2107001d6e48df…

MALICIOUS

PDF

69.9 KB Created: 2021-09-20 08:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 691f30c039b85895d1f0dc3972d046ba SHA-1: 9df118a403cb45907b29c1a5bcf213d59f70724d SHA-256: 1a2107001d6e48dfbb485090d091fce08ad58973cbb0261bc61bcb75ed95afba
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF sample was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The presence of many unknown URLs supports this, as they likely lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://dochoiotovn.com/uploads/userfiles/file/31098960879.pdf In PDF document text
    • http://ghefoot.com/fckeditor_userfiles/file/62666191079.pdfIn PDF document text
    • http://thrifthelp.com/flash/thrifthelp.com/file/tajatoleme.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/larekalazedafimuki.pdfIn PDF document text
    • https://carolinevlieghe.fr/images/file/47934055530.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/99143408811.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/19973732659.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/fazenetaxivod.pdfIn PDF document text
    • http://kisito.com/userfiles/file/naluxepepusexawemesasana.pdfIn PDF document text
    • http://xszhuhai.com/uploadfiles/files/60706750169.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/71131536889.pdfIn PDF document text
    • https://hongming-eco.com/userfiles/file/69345540406.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/97679225469.pdfIn PDF document text
    • http://es-iyashinomori.net/yamituki-n/uploads/files/88300537169.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/83833492233.pdfIn PDF document text
    • https://hanoihome.net/img_duhoc/files/kiruf.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/punagazisufubuvimako.pdfIn PDF document text
    • http://zhymwz.com/upfile/file/75993629196.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/4500820323.pdfIn PDF document text
    • https://ksdc.in/userfiles/file/forelozudet.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/jusizenasefepip.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/c04a0020cd6e736ec82e716c04bf228b/10462364701.pdfIn PDF document text
    • https://xcheck.vn/uploads/userfiles/file/84734362724.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=moto+x+3m+pool+partyPDF link annotation
    • 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_off0000b03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB03D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC84F 16760 bytes
SHA-256: 0ae8eccfca162e31453d39c1da7b6eb2c6522b2436224aa9ebdcf92dcfe067e6
font_02_sfnt_off0000f30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30E 10296 bytes
SHA-256: 91635974b0efbb308a8a1762158c45b7f5dc05136efff7c9f3689523f552f1c0

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