Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d9e63961973eb0…

MALICIOUS

PDF

60.1 KB Created: 2020-11-10 22:33:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 168940a8e9df2d747a0275f9d5227b52 SHA-1: 8236c64e4f69e8094a0d487f0caed4dda7405f1c SHA-256: 02d9e63961973eb057b9b0631f026d2fcec8e0092ecc340ebb9051a7ee78d5ab
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and S3-hosted PDFs, suggesting a link farm or SEO spam operation. One external URI, 'https://trafftec.ru/123?keyword=the+giver+chapter+20+questions+and+answers', is directly embedded. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing or trojan variant. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/123?keyword=the+giver+chapter+20+questions+and+answers
    • https://nofakuxuwuxow.weebly.com/uploads/1/3/4/6/134684799/xifenafegasof.pdf
    • https://jowodetuleguzu.weebly.com/uploads/1/3/1/8/131856173/58dce66.pdf
    • https://gulijigomun.weebly.com/uploads/1/3/4/3/134350957/8073962.pdf
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/6173575.pdf
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/jogowezokuvaxu.pdf
    • https://cdn-cms.f-static.net/uploads/4403947/normal_5fa40add4c4f7.pdf
    • https://sigogaxeba.weebly.com/uploads/1/3/4/6/134620414/ed6d869e.pdf
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/wefikipuzufawaseg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xutomoxu/snapper_riding_lawn_mower_manuals_online.pdf
    • https://s3.amazonaws.com/wibedubosateg/bubodudemibawebal.pdf
    • https://s3.amazonaws.com/gavexilatuvitaz/op_amp_integrator.pdf
    • https://s3.amazonaws.com/kakef/minecraft_1.4.4_mods.pdf
    • https://s3.amazonaws.com/taturi/32106105331.pdf
    • https://s3.amazonaws.com/povodijirig/safe_movie_download_sites_that_are_free.pdf
    • https://s3.amazonaws.com/pisik/46281245355.pdf
    • https://s3.amazonaws.com/tadovu/43035277006.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aeca.bin
ccba0041e9886adc7d21ffed80b696c6ec1751fa2d51edc56668428512e816ae
pdf-font-stream PDF embedded font (sfnt) at offset 0xAECA 5804 bytes
font_01_sfnt_off0000c294.bin
9f4d469520be3d20dbe458b387b2ce8ac120aba024be588e2816127ffe84224c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC294 9628 bytes