Malicious PDF — malware analysis report

Static analysis result for SHA-256 86abd11b050ccc94…

MALICIOUS

PDF

83.8 KB Created: 2021-05-21 11:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e90ef23690e071eb9b9227b8394d337d SHA-1: 3969c533797f6450e32b4e36fd4ee87e9a3f59a4 SHA-256: 86abd11b050ccc9445ccd6163b71ca0e4a241c1a142f1dfb61af2e4b496d13d5
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, including a link farm heuristic firing, suggesting a phishing or SEO manipulation tactic. The primary malicious URL, https://botokaw.ru/strik, is presented as a search result for a seemingly innocuous query, likely to trick users into clicking. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://botokaw.ru/strik?utm_term=how+do+you+play+jeopardy+in+the+classroom PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478148/normal_5fe75764e12b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494165/normal_5feda08297320.pdfIn PDF document text
    • https://madapupe.weebly.com/uploads/1/3/4/6/134667506/610f2110b54.pdfIn PDF document text
    • https://magifoxokepo.weebly.com/uploads/1/3/6/0/136053300/5086834.pdfIn PDF document text
    • https://regagilozot.weebly.com/uploads/1/3/1/8/131871395/xofalina.pdfIn PDF document text
    • https://korudodigujoko.weebly.com/uploads/1/3/0/7/130740169/7032331.pdfIn PDF document text
    • https://gixisisopovi.weebly.com/uploads/1/3/4/7/134713576/kemiga_selizevopuruwiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486969/normal_60017721be6c6.pdfIn PDF document text
    • https://jawenovexexadu.weebly.com/uploads/1/3/4/0/134012785/vopeto.pdfIn PDF document text
    • https://biziliwedurukax.weebly.com/uploads/1/3/4/8/134889104/2321098.pdfIn PDF document text
    • https://menajogatidufe.weebly.com/uploads/1/3/0/7/130740573/putafabijejopo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/23741541860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b12c461a-5f8c-4974-94cd-014d7141942e/how_to_fix_a_frigidaire_front_load_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8661b04-ca2b-4a15-a48b-2ae45f8e0685/star_wars_rebels_black_series_ahsoka_tano_figure_6_inch.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/61183755654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90dd5e68-242b-4428-a8d1-465cb1045665/41743737652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/642bcac8-5a4a-4d18-ab60-b66238d1b33c/insignia_24_inch_smart_tv_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/mapazadapowatasunudevela.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/niwoleti.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/pobisopuzudawu.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/charles_bukowski_libri.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/gogejabepinupesokomu.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/79663175443.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22F 5544 bytes
SHA-256: 10e600deb7f51cb89e726f71e365fca8d9486a5e23d517a34136a50a630dbd99
font_01_sfnt_off000104f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F8 11136 bytes
SHA-256: 2ab293cb10fefd3b24bebf8e5f09545a2fcf02de6b57dbf3f4726efeea068019
font_02_sfnt_off00012b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B00 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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