Malicious PDF — malware analysis report

Static analysis result for SHA-256 622d777c62f0c886…

MALICIOUS

PDF

84.1 KB Created: 2021-01-09 14:53:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 4ce00c4e68b37d31031050d5225b8903 SHA-1: 2a133b336f867b0da802171243cccbaeb14066d8 SHA-256: 622d777c62f0c886d2b95253fc6baae338472ed7cd592755e9703234d4841ec0
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or disposable hosting, suggesting a link farm for phishing or malware distribution. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure, and ClamAV detected it as a phishing trojan. The document body, though heavily obfuscated, contains keywords like 'minecraft mining levels mod' which are likely used to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=minecraft+mining+levels+mod In PDF document text
    • https://cdn.sqhk.co/kesusevuzep/ihaycl0/21192349511.pdfIn PDF document text
    • https://cdn.sqhk.co/xugikokazo/ighhCtv/pimepugifedere.pdfIn PDF document text
    • https://cdn.sqhk.co/lexuxeza/8ha57Q2/sea_monster_city_hack_mod_apk.pdfIn PDF document text
    • https://wonikisemuk.weebly.com/uploads/1/3/4/9/134902350/loperiman.pdfIn PDF document text
    • https://judenebubiz.weebly.com/uploads/1/3/4/6/134656374/masirija-bejutavijumalu-tulutaxoxol.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/a6DHgd3/homemade_beef_burgers_cooking_time.pdfIn PDF document text
    • https://cdn.sqhk.co/poladejug/jaghojj/8918358398.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/clIiaGm/18068494086.pdfIn PDF document text
    • https://lemisisax.weebly.com/uploads/1/3/4/4/134494561/a9609c2bb4645.pdfIn PDF document text
    • https://cdn.sqhk.co/bowawugafux/fugd0QX/state_trooper_phone_number.pdfIn PDF document text
    • https://pilewamef.weebly.com/uploads/1/3/4/8/134849526/riwanelinidi_jegaxofuwu_sixosibijiwo_medav.pdfIn PDF document text
    • https://depazazivika.weebly.com/uploads/1/3/4/6/134697987/8656252.pdfIn PDF document text
    • https://dubigeta.weebly.com/uploads/1/3/5/3/135341625/ronamituvij_dadiw_zeredasadoteb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb1e0d64-a354-454a-b630-736a826d511a/knight_of_cups_reversed_love.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58230314-be0b-4491-a6fd-dec096a7aa2a/harry_potter_pop_figures_set.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_off000101ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AE 2952 bytes
SHA-256: f99720ce291195ba3579ea38ac976287f614cecb041683938a7baac3edf92520
font_01_sfnt_off00010c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C29 5408 bytes
SHA-256: b2052eed9ae63b5e2c1ad767bacf18a9005b4db61c07eaaa7f8bfd86d04dc118
font_02_sfnt_off00011e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8C 10764 bytes
SHA-256: 7d5d1d884d7209f682b39677952a1da187acd854b7fa4c33f2d7352e65f6e970

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