Malicious PDF — malware analysis report

Static analysis result for SHA-256 b269c1c1ac880c3e…

MALICIOUS

PDF

85.1 KB Created: 2021-04-05 20:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be02e403326d5ed30c9e9e5b44bbce05 SHA-1: ddb9f65f7b4066bde01c189b4050f7b6e7322d49 SHA-256: b269c1c1ac880c3ee53493ef115ea065bf81f668c33b2cbc96e9293dbe02f5c9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. The presence of a large number of external links, many pointing to PDF files, suggests a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://ponafet.ru/123?utm_term=careem+app+apk+latest+version', indicates a potential lure related to application downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/123?utm_term=careem+app+apk+latest+version
    • https://cdn.sqhk.co/temejikowewa/cgdifV4/45149291767.pdf
    • https://cdn.sqhk.co/budajawisore/J5Qjugg/27220093650.pdf
    • https://cdn.sqhk.co/febenapox/j9jbXhg/tejakoxip.pdf
    • https://cdn-cms.f-static.net/uploads/4447258/normal_602534ffdc22f.pdf
    • https://static.s123-cdn-static.com/uploads/4370078/normal_6002100c872b8.pdf
    • https://wuxorazaw.weebly.com/uploads/1/3/2/7/132712222/4135740.pdf
    • https://static.s123-cdn-static.com/uploads/4482424/normal_5fe41baf47557.pdf
    • https://wepejusekubikur.weebly.com/uploads/1/3/4/4/134441987/1258992.pdf
    • https://cdn-cms.f-static.net/uploads/4452595/normal_6044fb749b38f.pdf
    • https://naratejog.weebly.com/uploads/1/3/2/6/132682615/xewasowu-newokubopi.pdf
    • https://cdn.sqhk.co/gedugari/dm6Zfij/94440087285.pdf
    • https://fabupegux.weebly.com/uploads/1/3/4/6/134689396/fesajojobalikew-kobasigegumiw.pdf
    • https://static.s123-cdn-static.com/uploads/4368228/normal_5fe48c4d6f3ac.pdf
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/239676.pdf
    • https://gitexapovaje.weebly.com/uploads/1/3/4/4/134464395/vepikaf-wafidudijutixap-manim-sofojowid.pdf
    • https://cdn-cms.f-static.net/uploads/4426062/normal_5fe7e7fa42351.pdf
    • https://gegovowazuravas.weebly.com/uploads/1/3/1/3/131398401/211cb72be.pdf
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/xananukifolaw_nobujanamopexan_lalemuvaj.pdf
    • https://cdn-cms.f-static.net/uploads/4479254/normal_6037f760097f5.pdf
    • https://cdn-cms.f-static.net/uploads/4467581/normal_604c9768a68c7.pdf
    • https://vezidinudavad.weebly.com/uploads/1/3/4/4/134481570/8fc6873e63474.pdf
    • https://cdn.sqhk.co/wodelaganav/jhZngjT/fun_cheats_for_sims_4_xbox_one.pdf
    • https://cdn-cms.f-static.net/uploads/4489976/normal_60395e9d85b20.pdf
    • https://static.s123-cdn-static.com/uploads/4401712/normal_5fe05b6026f29.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vufupu/98416481822.pdf
    • https://s3.amazonaws.com/vigevot/44361162886.pdf
    • https://s3.amazonaws.com/nisoxow/how_to_set_timex_ironman_triathlon_watch.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001037b.bin
75dd18f875d65e6660fa8824e71c2c6abeadd88535bb417bda83bb80a119e9c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1037B 4900 bytes
font_01_sfnt_off0001140e.bin
c472b8d20e9433467ef12abb313e5b33fe79a64f2a494370a22182af9f3d0468
pdf-font-stream PDF embedded font (sfnt) at offset 0x1140E 10692 bytes
font_02_sfnt_off000138b2.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x138B2 4324 bytes