Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a8bc9ee4482d1b6…

MALICIOUS

PDF

77.8 KB Created: 2021-04-03 13:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a56caf58b85297d22d562ff60346290 SHA-1: 994e2fd7107faba43e971e775de95bfb8bc4d380 SHA-256: 0a8bc9ee4482d1b683171a085072fdd92abd90b1fbacdbd025dc31cc3be18855
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing lures, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature. The embedded URLs, such as 'https://lozipotod.ru/wix?keyword=every+15+minutes+2019', are likely used to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/wix?keyword=every+15+minutes+2019
    • https://sikiroradimer.weebly.com/uploads/1/3/4/6/134619363/zozufinipixibeg_rikakem.pdf
    • http://wewogokuwidu.mywebcommunity.org/english_conversation_in_school.pdf
    • https://cdn-cms.f-static.net/uploads/4416787/normal_6035c00b781de.pdf
    • https://lopowizuxo.weebly.com/uploads/1/3/4/4/134438001/kapaxikev.pdf
    • https://static.s123-cdn-static.com/uploads/4479236/normal_5fc7bc1e4dc86.pdf
    • https://vemusosafuz.weebly.com/uploads/1/3/1/3/131398108/jibolisiruxi.pdf
    • https://jawokipuroz.weebly.com/uploads/1/3/4/2/134265350/nazat-kixukebopuguf-kotowolegatadef-fazivat.pdf
    • https://pubetazona.weebly.com/uploads/1/3/4/5/134584774/bevuwinugabixobozumo.pdf
    • https://gewipilozu.weebly.com/uploads/1/3/0/7/130775211/1466233.pdf
    • https://xugeguva.weebly.com/uploads/1/3/1/4/131438310/bf0b64ccc600ebd.pdf
    • https://cdn-cms.f-static.net/uploads/4462368/normal_60605e9292241.pdf
    • https://cdn-cms.f-static.net/uploads/4386828/normal_603fc80e7f7fc.pdf
    • http://pexarinolal.mypressonline.com/anais_nin_venerina_delta.pdf
    • https://buwigare.weebly.com/uploads/1/3/5/3/135308802/762603.pdf
    • http://kokolonesafu.getenjoyment.net/542308543.pdf
    • https://metekazup.weebly.com/uploads/1/3/2/8/132815755/toluwe.pdf
    • https://cdn-cms.f-static.net/uploads/4394082/normal_60356dbdc2a07.pdf
    • http://bapatavusirave.mygamesonline.org/how_do_you_reset_an_lg_refrigerator_air_filter.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_0f17aca057c548d084ad5cd605f7b6e7.pdf?index=true
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_1d672c94f80e4876a3a959cc72c53850.pdf?index=true
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_f1af1e0b38d5492fa9f6430de737528e.pdf?index=true
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_511be097abe64961adb7ebd787884974.pdf?index=true
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_c1418666305340c4b9c7901b755a3271.pdf?index=true
    • 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_off0000efbe.bin
d1ed704f839dbece6ee786d536b956ce5e1236139dd8ee64dee835fdd99265a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBE 5316 bytes
font_01_sfnt_off000101d4.bin
a2170ec0e4681c76ee4043bf9efeb9ab82d4c79902baf9c35e39f589e71b25dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D4 11980 bytes

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