Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9482101d46856cd…

MALICIOUS

PDF

78.4 KB Created: 2021-03-01 10:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e3e49513a0a8af377ece550bc484d9a1 SHA-1: 753b636be415938c4e189f810b2392c92ac785ee SHA-256: b9482101d46856cd5923943d79c83f00cb8e2de48789aa2700c6972921110ae7
96 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically identifying it as a phishing trojan. An embedded URL points to a suspicious domain, likely a phishing site. While no scripts were explicitly extracted, the nature of PDF malware often involves exploiting vulnerabilities or redirecting users, aligning with the identified phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/aws?utm_term=imax+b6ac+v2+manuale+italiano PDF link annotation
    • http://vobalemujumojak.mywebcommunity.org/carlson_surveyor_2.pdfIn PDF document text
    • http://bet-info.ru/eine_kleine_nachtmusik_piano_sheet_musicnwgc1.pdfIn PDF document text
    • http://sezejawi.mypressonline.com/14658580648.pdfIn PDF document text
    • http://kokolonesafu.getenjoyment.net/84219872548.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pekudus.rf.gd/consuming_fire_song.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/84822249256.pdfIn PDF document text
    • http://fopekexu.epizy.com/64026046677.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/25854462475.pdfIn PDF document text
    • http://sanobinam.rf.gd/human_anatomy_and_physiology_lab_manual_cat_version.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/28596969222.pdfIn PDF document text
    • http://zonatitusajobo.onlinewebshop.net/i_am_not_okay_with_this_book_barnes_and_noble.pdfIn PDF document text
    • http://pudofifomabevin.rf.gd/lucky_strike_cigarette_box_template.pdfIn PDF document text
    • http://jajoxutevo.epizy.com/mufipiretete.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/nonlinear_continuum_mechanics_of_solids.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_off0000df22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF22 5160 bytes
SHA-256: a9ba58470553b15f9e05d26a69efe19faa20dda2d7ddc503f6246f2973697f54
font_01_sfnt_off0000f0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AF 11500 bytes
SHA-256: 30970bbaa9e09faf59c7c2aeeea0f838940d21b2e43e2f4b4de44863b10584f1
font_02_sfnt_off00011760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11760 16208 bytes
SHA-256: 560e11d5da3ed60647d844d0127c34f4fbbc0b68999cbe35161ddcd790341c9f

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