Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d63de0c9e40c659…

MALICIOUS

PDF

73.2 KB Created: 2021-01-10 03:24:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9ce0ceacfef040b97d7e2c91ceabac10 SHA-1: 29dc13b339385336b863f00a09133ed092a38c20 SHA-256: 9d63de0c9e40c65926ba9e1780590fa39a216f385031c3c359db07195e90890e
126 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external links, many hosted on disposable domains, suggesting a link farm used to distribute malicious content or redirect users to phishing sites. The document body's garbled content and the presence of external URIs point towards an attempt to obfuscate the malicious intent and lure victims to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 https://traffset.ru/aws?utm_term=minecraft+bedrock+edition+addons PDF link annotation
    • https://site-1166652.mozfiles.com/files/1166652/39320503642.pdfIn PDF document text
    • https://site-1201164.mozfiles.com/files/1201164/kiki_s_delivery_service_book_cover.pdfIn PDF document text
    • https://site-1168109.mozfiles.com/files/1168109/64991956712.pdfIn PDF document text
    • https://site-1177214.mozfiles.com/files/1177214/83530981663.pdfIn PDF document text
    • https://site-1172435.mozfiles.com/files/1172435/mawepumemubemama.pdfIn PDF document text
    • https://femobideja.weebly.com/uploads/1/3/4/7/134735935/6255098.pdfIn PDF document text
    • https://site-1176116.mozfiles.com/files/1176116/dofatuvevikineziji.pdfIn PDF document text
    • https://site-1177051.mozfiles.com/files/1177051/simplerockets_2_mod_apk_android_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/damerirazib/iracema_adoniran_barbosa.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/boy_hairstyle_photo_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/15251247435.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AB 5192 bytes
SHA-256: d8ddde9c9e34d16a7ba18ed491ea8498693acac77960459d3ab284e956983fb4
font_01_sfnt_off0000f372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF372 10624 bytes
SHA-256: 85cac379bb911402b24cca5955c61ce1cd0e8941934423ed1a22142ec6dfaa4a

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