Malicious PDF — malware analysis report

Static analysis result for SHA-256 909ff77bdd239bea…

MALICIOUS

PDF

80.0 KB Created: 2021-03-20 04:53:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96e1f9ecf431cf021451deea964726bf SHA-1: b5558f9246a55f788921f24cc1ffd0efeb6a1707 SHA-256: 909ff77bdd239bea0c16764cd2752a494b73d68cb860de2b592956ab3114075d
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm, with the primary URL pointing to a site offering 'gta 5 v mod apk'. This suggests a phishing or scam attempt, likely to trick users into downloading potentially unwanted or malicious software. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/wix?keyword=gta+5+v+mod+apk
    • https://lenapejasuma.weebly.com/uploads/1/3/4/7/134749539/gakenafufoxaj-gozebowubumaj-dagidatelak.pdf
    • https://static.s123-cdn-static.com/uploads/4474750/normal_5ff4eeaab319f.pdf
    • https://bidawuvebera.weebly.com/uploads/1/3/5/3/135390130/edfe72af9.pdf
    • https://vabadagijuruka.weebly.com/uploads/1/3/1/8/131856539/8f91ec9.pdf
    • https://cdn.sqhk.co/zenipijujate/jdMDUhh/word_collect_level_1593.pdf
    • https://static.s123-cdn-static.com/uploads/4375353/normal_5fcff5d511001.pdf
    • https://giruwikepu.weebly.com/uploads/1/3/4/4/134464081/lepudim.pdf
    • https://fudatavog.weebly.com/uploads/1/3/4/8/134894714/e296e75c99.pdf
    • https://cdn.sqhk.co/nixibaraje/cdUkgiE/vowonokono.pdf
    • https://cdn-cms.f-static.net/uploads/4381340/normal_603a6021a1a7d.pdf
    • https://cdn-cms.f-static.net/uploads/4387918/normal_6054ace871fff.pdf
    • https://static.s123-cdn-static.com/uploads/4374536/normal_5ffc0805b4892.pdf
    • https://venunuwaxel.weebly.com/uploads/1/3/2/7/132740799/376583.pdf
    • https://static.s123-cdn-static.com/uploads/4454990/normal_5fee47f198294.pdf
    • https://cdn.sqhk.co/wanazofemuvu/gcmmCgi/wood_cutting_laser_machines_for_sale.pdf
    • https://tipureroxagojox.weebly.com/uploads/1/3/6/0/136096040/2575065.pdf
    • https://cdn-cms.f-static.net/uploads/4462714/normal_60212a5c63870.pdf
    • https://static.s123-cdn-static.com/uploads/4476595/normal_5fc6ccb28abb7.pdf
    • https://cdn.sqhk.co/dixejetafap/vliglie/supercut_hair_salon_near_me.pdf
    • https://cdn-cms.f-static.net/uploads/4393016/normal_6047c4245406a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/minegikukovel/stranger_chat_anonymous_mod_apk.pdf
    • https://s3.amazonaws.com/xajowu/rosegi.pdf
    • https://s3.amazonaws.com/samopakamefap/41095455239.pdf
    • https://s3.amazonaws.com/fajonubinomeder/org_chart_template.pdf
    • https://s3.amazonaws.com/gazijewevan/82472282655.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc2.bin
116d1e6ebb7d3d74ea956917181612755e189424841cf43339be586020cf1eb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC2 5076 bytes
font_01_sfnt_off0000ff0e.bin
a40b6a176df67df118a5c0fd38cd88769c19a53a50c28d260e56747f5c14d550		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0E 22756 bytes

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