Malicious PDF — malware analysis report

Static analysis result for SHA-256 62181b9b8ecd952b…

MALICIOUS

PDF

94.3 KB Created: 2021-02-11 14:06:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: feba490295c76715975631382a06de26 SHA-1: d3c4be1ad8fe3f055e08924fd250ce69f42e6857 SHA-256: 62181b9b8ecd952bc93df909fcc840ab925fc64ca02088d65ddbf89ae59c539c
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and hosted on services like sqhk.co and weebly.com, indicating a link farm or redirection scheme. The presence of the URL 'https://maypoin.ru/123?keyword=free+sling+tv+hack+apk' suggests a lure related to hacking or illicit software. ClamAV and ML heuristics confirm the malicious nature, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to drive traffic to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://maypoin.ru/123?keyword=free+sling+tv+hack+apk PDF link annotation
    • https://cdn.sqhk.co/pixafosabow/wieVv75/reading_skills_worksheets.pdfIn PDF document text
    • https://bopisigo.weebly.com/uploads/1/3/1/4/131453919/tamivazuterovopet.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/x6gdije/forokuxulelalufagetunen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457008/normal_5fce07b23e562.pdfIn PDF document text
    • http://fiselijuduguge.iblogger.org/bergamota_doterra_espaol.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/6Q1dOhA/kizefe.pdfIn PDF document text
    • https://cdn.sqhk.co/gidowoji/haZsbhf/cover_orange_2_level_3-_11.pdfIn PDF document text
    • https://woteginawewe.weebly.com/uploads/1/3/1/3/131379999/wopeso-tibufurufitup-fitaruxugoxi-wemomo.pdfIn PDF document text
    • https://xemageka.weebly.com/uploads/1/3/1/3/131380316/2169212.pdfIn PDF document text
    • http://dafilor.iblogger.org/gerena.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/5Oeidgd/future_ninja_infinity_robot_warrior.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/d8B3gdc/gusidagel.pdfIn PDF document text
    • https://mepokebifonamos.weebly.com/uploads/1/3/4/0/134096039/2058112.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/gidibesuxi/glioma_glioblastoma_multiforme.pdfIn PDF document text
    • http://rabogefegu.epizy.com/dikuwukusanipedi.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/zlib1._dll_windows_7_64_bit.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12817 4952 bytes
SHA-256: f8f5c474622b7f1cdb59d9b60c6b62540c33fbfbfd458d75033423b427b74d71
font_01_sfnt_off000138e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E6 10872 bytes
SHA-256: b1eb624f3a71e2e3efec79138b0e9cd0788b09d916999923ce3feaea4c48efc9
font_02_sfnt_off00015e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E19 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3