Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b02c47733410fe0…

MALICIOUS

PDF

75.3 KB Created: 2021-02-13 18:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5f0c08674c1723625bd2add82c370de2 SHA-1: 5d4cfe40312e129c8ef641ab94a3e7970a8019e1 SHA-256: 4b02c47733410fe05c029e3fd544aff2f870436df7247a11e4b71315058f08b9
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a PDF SEO link farm. The primary malicious URL observed is jottigo.ru, which is likely used to redirect users to further malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan-like behavior.

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 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.
  • 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/wix?keyword=captain+vincent+russo PDF link annotation
    • https://lepovomika.weebly.com/uploads/1/3/4/7/134701686/ponegazinolov.pdfIn PDF document text
    • https://depasosuva.weebly.com/uploads/1/3/4/4/134483816/befure.pdfIn PDF document text
    • https://riviruzo.weebly.com/uploads/1/3/0/7/130739493/3621162.pdfIn PDF document text
    • https://turoliletipusu.weebly.com/uploads/1/3/5/9/135969349/5383377.pdfIn PDF document text
    • https://somusepuxe.weebly.com/uploads/1/3/1/0/131070447/1552074.pdfIn PDF document text
    • https://sakotitalivuvu.weebly.com/uploads/1/3/4/8/134887700/9675805.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/nataborala.pdfIn PDF document text
    • http://pamakejexo.epizy.com/4364474921.pdfIn PDF document text
    • http://kugixuxekut.rf.gd/vozowarakulasonunateg.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/printable_templates_for_50th_birthday_invitations.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/britannicus_english_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/rawivulat.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/wotamibedagurolipeluxu.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/65824862403.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/formal_dress_boutiques_in_baton_rouge.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D8 4860 bytes
SHA-256: dd76edd981c2e4f73e87d803467db059d7d1d1a6edc472a595d0000199a07942
font_01_sfnt_off0000da72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA72 10036 bytes
SHA-256: 997f37405e0ff8c45d7fd83b4cb325d9168fa1203f9f9d56e65c8fd0b9b3719b
font_02_sfnt_off0000fcfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFC 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off0001122a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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