Malicious PDF — malware analysis report

Static analysis result for SHA-256 9009b8c7aa5af690…

MALICIOUS

PDF

87.6 KB Created: 2021-03-13 23:30:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c14f8604bf70f7f2ecd1295566133f67 SHA-1: b08e8fb696b55ac54d32bb16e83ddb20a6708b65 SHA-256: 9009b8c7aa5af6900adb9931381cc970f80f0043fc481b5b5e7123ad5dc67899
134 Risk Score

Malware Insights

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

This PDF document functions as a link farm, containing numerous external links disguised as a 'Boy scout merit badge tracking spreadsheet'. The primary heuristic firings indicate a large number of external links, many hosted on disposable domains, suggesting a malicious SEO or phishing campaign. While no scripts were explicitly extracted, the PDF structure and extensive link farm are indicative of an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/wix?keyword=boy+scout+merit+badge+tracking+spreadsheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368991/normal_6020ffb5b7cfe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407562/normal_5ff5176156ec6.pdfIn PDF document text
    • https://rebejudan.weebly.com/uploads/1/3/5/3/135316845/504de86.pdfIn PDF document text
    • https://mamiwego.weebly.com/uploads/1/3/4/3/134315995/213499.pdfIn PDF document text
    • https://xefafarorul.weebly.com/uploads/1/3/4/6/134698093/26c60a835289a.pdfIn PDF document text
    • https://falototadapi.weebly.com/uploads/1/3/3/9/133989324/0541095df4945d.pdfIn PDF document text
    • http://oneitstore.info/mosumazitisenusozemusofed14zcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501229/normal_601aabf32e5eb.pdfIn PDF document text
    • https://powelogub.weebly.com/uploads/1/3/1/8/131871449/xexukuli_viresik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379606/normal_5ff0354a6633a.pdfIn PDF document text
    • http://rijazozetofovi.22web.org/gelisafarojege.pdfIn PDF document text
    • http://bathforlegs.xyz/49305777362hb1wo.pdfIn PDF document text
    • https://fuvedomuwipiw.weebly.com/uploads/1/3/1/6/131636935/fomaginudorukilelonu.pdfIn PDF document text
    • https://kaginugopaz.weebly.com/uploads/1/3/4/3/134310825/tabegitufal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473656/normal_600004b97f2fd.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://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_197511d13a1a44e8ac3adea352103345.pdf?index=trueIn PDF document text
    • http://zamonile.epizy.com/22774102524.pdfIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_364f9b4c4c5b443fa569be1e24380d5a.pdf?index=trueIn PDF document text
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_353b05cc2dc7416d99c18b1fd456ccd2.pdf?index=trueIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_37b3a4dbb749457c948586280d74cc24.pdf?index=trueIn PDF document text
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_d4a903c1ba8b4596b3a0fccef1ebcb71.pdf?index=trueIn PDF document text
    • http://gizimup.epizy.com/how_much_are_boy_scout_wreaths.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C19 5692 bytes
SHA-256: a4734bc2175209c093c99dcb3bb44f37e2bd9b33a783842e33c774289aa7b6dd
font_01_sfnt_off00011f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4C 10464 bytes
SHA-256: 85a7dee548a007bcec7af47cebee65819dc2e25875377dc92d48e60350296d44
font_02_sfnt_off000142d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c