Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5b9e3ad8656820…

MALICIOUS

PDF

86.6 KB Created: 2021-01-05 13:38:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 29e6f1db8bc2770597d4e644b9bb4240 SHA-1: 30b185254442632d65d99d1777140b8ab9b6d245 SHA-256: 1f5b9e3ad8656820ab938f9e264138bbad7d5d1baff28a256f15a6347ebbf502
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used to obscure malicious destinations and create link farms. The primary URL, 'https://traffnew.ru/aws?utm_term=learn+korean+with+bts+pdf', suggests a phishing or scam attempt disguised as educational content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffnew.ru/aws?utm_term=learn+korean+with+bts+pdf PDF link annotation
    • https://nutifikidejuz.weebly.com/uploads/1/3/4/3/134347692/xixuxuna_zumewuko_rotimepa_rolop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495264/normal_5fbbfc376f06c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475729/normal_5fe3a79a5c74a.pdfIn PDF document text
    • https://mefogogid.weebly.com/uploads/1/3/4/6/134600117/7354941.pdfIn PDF document text
    • https://movireralu.weebly.com/uploads/1/3/4/8/134879142/kekigulutedo_tawefazulikaro_jonenisuwufitip.pdfIn PDF document text
    • https://cdn.sqhk.co/mozedizupi/jT1jivW/42286215210.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/mafavuzenoliki/how_i_treat_aplastic_anemia.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/defisesenesunonexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d20712e0-9f7d-47e1-a6a6-deb2580ef68a/51725550019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d2150dd-a27c-4b53-beaa-343fe46d6ff3/49862986769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd85a6a-3ec6-4756-868e-17a07cf9f67c/live_football_european_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/113cc57b-a837-4866-bf49-5e2cc5f1345a/57262415142.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/nizisumotadedubefunuw.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/78603781929.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34C 6588 bytes
SHA-256: 4e1a9c4cb32f1bc4ff176ae4dc1460c31b2d267bf2def0252f23ad2731e7be72
font_01_sfnt_off0000f3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C5 5124 bytes
SHA-256: 877f5578c3f14b5d42003a0a5afe066cfce1a48b995f3dd915b1c4d401a931b8
font_02_sfnt_off00010530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10530 10548 bytes
SHA-256: 6218a67c85b9017ffed7e762e35604e91509eb47c9afd20bef2e081e9a512c1b
font_03_sfnt_off00012967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12967 16168 bytes
SHA-256: 3753bffb8877ea40fa0e96c2d0711e4dd70c5d14f98bd0b9fe0a0a4777fe19d2
font_04_sfnt_off00013e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E6D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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