Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ccae32d0147391a…

MALICIOUS

PDF

70.0 KB Created: 2021-02-19 10:59:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4cf0a415b3504089111d2d302b62082f SHA-1: f58e0a03d4fbd61b4b8923c1ec88d558c0de3551 SHA-256: 9ccae32d0147391aae722beb475eb419ebc5c026bc8e85458cd4030f038df80b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to domains commonly used for SEO spam and phishing. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a mass of external links, suggesting a malicious intent to redirect users. While no scripts were explicitly extracted, the presence of numerous suspicious URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wb?keyword=troy%20bilt%20riding%20lawn%20mower%20user%20manual PDF link annotation
    • http://dulexip.22web.org/81500783063.pdfIn PDF document text
    • https://cdn.sqhk.co/xewafazuk/jcThugf/bukewetulibini.pdfIn PDF document text
    • http://cz-nitrof.website/how_to_make_homemade_slime_without_boraxvir1l.pdfIn PDF document text
    • http://marketeuro.pro/754832488122l9zw.pdfIn PDF document text
    • http://fofodabigejobe.22web.org/33405960223.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/n11kigy/14429748002.pdfIn PDF document text
    • https://cdn.sqhk.co/fenozidu/bPhigcl/hungry_bunny_toy.pdfIn PDF document text
    • https://peruvapi.weebly.com/uploads/1/3/0/8/130813059/jegiwizijifejit.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/rgjPgfL/assassin_s_creed_identity_offline_mod_apk_obb.pdfIn PDF document text
    • https://zonujonuwug.weebly.com/uploads/1/3/4/3/134309714/80763ea6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jataluwapimose.rf.gd/semapedezadakitofos.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/jogipodenalawekimo.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/beats_studio_three_wireless_review.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/albacore_tuna_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/chakravakam_telugu_serial_all_episodes_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/28182669830.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/27932310580.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/notepad_auto_format_xml.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F9 5428 bytes
SHA-256: e69f38cc3dc7e6975416bab9cae3249dd09d1056478e7e75db51678471430cfc
font_01_sfnt_off0000e76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76D 10444 bytes
SHA-256: af724a78f251fe3afb9d4030dceb5b6561cac9c6d9fdb44cfa1e45fde6b19955

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