Malicious PDF — malware analysis report

Static analysis result for SHA-256 57daff905045dacd…

MALICIOUS

PDF

79.9 KB Created: 2020-12-28 09:33:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 88302b5eeb501d8c7a9410711df5494c SHA-1: d5e969a803ae5c5e5afa72acd6f27cf54aa82384 SHA-256: 57daff905045dacde7c33f32026bd4508786e66aeee7d6cc7dff2f7a21b8f854
214 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, forming a link farm. One prominent link directs to 'ggtraff.ru', identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though heavily obfuscated, contains text related to game mods and money, suggesting a lure to attract users to click on the malicious links.

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
  • 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.
  • 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://ggtraff.ru/strik?utm_term=idle+robbery+mod+unlimited+money In PDF document text
    • https://cdn-cms.f-static.net/uploads/4472773/normal_5fafae27e5c41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420245/normal_5fa29f5b1f62c.pdfIn PDF document text
    • https://cdn.sqhk.co/tegatiwuwax/ge8lkje/14566181286.pdfIn PDF document text
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/tuluwe_pukixideti.pdfIn PDF document text
    • https://cdn.sqhk.co/xowuzaseku/WVFmjjZ/other_name_for_green_beans.pdfIn PDF document text
    • https://jokepalebaja.weebly.com/uploads/1/3/4/3/134360350/bisar-taseduj.pdfIn PDF document text
    • https://pudafakomixi.weebly.com/uploads/1/3/4/5/134506615/fasinoxiti-bipafopisik-lukowawavuvej-menimi.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/aq6gj7S/choices_stories_you_play_cheats_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/ghggjgM/zombie_road_racing_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413122/normal_5f944159a8130.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://uploads.strikinglycdn.com/files/8a5203f8-4e5c-45f3-a7e6-7e4c56563b08/miboxirakipajebibulurosef.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE172 2880 bytes
SHA-256: 80960c5ef920dc812f40421d0c41ad5272b60f71c1256c1bdf7a11afd8d5b2df
font_01_sfnt_off0000ebaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAF 4644 bytes
SHA-256: 143167c8965a05ef6e5e51d82d00c49af8eaedbea03b35b2b294e7722602dcd0
font_02_sfnt_off0000fb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB51 11848 bytes
SHA-256: 20d7797a0f7e4face4f1156669c1a6575c35eeb569392a5f74800cf12449cb40
font_03_sfnt_off0001222b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222B 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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