Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bcfd7ed553a89de…

MALICIOUS

PDF

80.5 KB Created: 2021-03-12 12:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ceb2bd5b4ab093ee54cf076886d55e9c SHA-1: f4746daa153dbe34f33d23e0c19779810a105b98 SHA-256: 6bcfd7ed553a89de4b91dca818cc435f52253c04ac1f105094208a689200ed29
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'alcohol abuse pdf'. No scripts were extracted from this sample, but the presence of external links and the high confidence of detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/123?utm_term=definition+of+alcohol+abuse+pdf PDF link annotation
    • https://xazonulukobimov.weebly.com/uploads/1/3/2/7/132712199/1262582.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/constitutional_law_outline_law_school.pdfIn PDF document text
    • https://nolutoxut.weebly.com/uploads/1/3/4/6/134683805/8a4bc621.pdfIn PDF document text
    • http://sepozimog.scienceontheweb.net/68901880167.pdfIn PDF document text
    • http://tebeririz.scienceontheweb.net/82562738157.pdfIn PDF document text
    • https://levarimabogi.weebly.com/uploads/1/3/5/3/135328943/3398352.pdfIn PDF document text
    • https://tupinikuwexopej.weebly.com/uploads/1/3/1/0/131070806/tidikujorezen.pdfIn PDF document text
    • https://sijujufe.weebly.com/uploads/1/3/4/6/134696532/496799.pdfIn PDF document text
    • http://tiwujatujoput.mygamesonline.org/57826522941.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/sennheiser_rs_175_headphones_australia.pdfIn PDF document text
    • http://xivobivivupe.mygamesonline.org/ti_82_games_code.pdfIn PDF document text
    • http://dudisukogonox.iblogger.org/gutesaxabinomibawoxemo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fafezevasuba.rf.gd/90830914835.pdfIn PDF document text
    • http://jarepumemaxi.onlinewebshop.net/bipufitomix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb560ff-2400-4f6e-b961-71d02967345c/20672994155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1ee0a7b-87f5-4c1a-b141-2ef14d5e9b5f/96289376733.pdfIn PDF document text
    • http://refuzopil.epizy.com/rokuterakeradomanu.pdfIn PDF document text
    • http://bitines.myartsonline.com/become_a_better_you_joel_osteen.pdfIn PDF document text
    • http://xuwuwum.epizy.com/37101729132.pdfIn PDF document text
    • http://fowuzubu.rf.gd/still_alice_summary_chapter_by_chapter.pdfIn PDF document text
    • http://wegamaluperetuj.atwebpages.com/13722149474.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
    • 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_off0000e798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE798 5284 bytes
SHA-256: 18317b0a6634b414dfbe3c7f99c0a51ed48b5c6865674e31ed248b9f33c7e4f0
font_01_sfnt_off0000f996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF996 11240 bytes
SHA-256: b2a6a144ed8efa37c9cd4b2c227dfbe9478af73d895b7626c3dc278be53fb17a
font_02_sfnt_off00011f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4A 16060 bytes
SHA-256: df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210

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