Malicious PDF — malware analysis report

Static analysis result for SHA-256 b432bcab9d1794bc…

MALICIOUS

PDF

113.7 KB Created: 2021-04-01 12:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54309dbb572f914786e187c13c72ce79 SHA-1: d4068cca11e422461618d39fad63d30cc6c075b4 SHA-256: b432bcab9d1794bc6a8d5cdb37420057857bd7d72fef9b8fdcd08cb567f00208
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it's part of a link farm or phishing campaign. The PDF_SEO_LINK_FARM heuristic specifically points to a mass of external PDF links, with the primary observed URL being https://jumiwimov.ru/123. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/123?utm_term=am%25C3%25A9liorer+sa+confiance+en+soi+pdf
    • https://jotulamopusojo.weebly.com/uploads/1/3/4/4/134465369/3012217.pdf
    • http://sazinoz.mypressonline.com/83295399572.pdf
    • http://gejulavofanutar.mygamesonline.org/type_b_blood_diet_food_list.pdf
    • https://mitenipup.weebly.com/uploads/1/3/4/3/134363071/13164fd60426.pdf
    • http://hytri.com/ledarufomulusaxc4mr.pdf
    • https://pudevezogezuk.weebly.com/uploads/1/3/4/5/134528534/segire.pdf
    • http://formulamoney.top/how_to_search_google_by_image_size946oz.pdf
    • http://fartook.online/eragon_book_series_list_in_orderaz3vv.pdf
    • https://zewevenetox.weebly.com/uploads/1/3/4/4/134477768/9678881.pdf
    • http://ipoteka.net/lopimaqf0az.pdf
    • https://jubigugatuse.weebly.com/uploads/1/3/0/7/130775741/netunavirojatowiga.pdf
    • https://xavabakonoliwif.weebly.com/uploads/1/3/4/4/134477423/lopebiremov.pdf
    • https://puvugemamoj.weebly.com/uploads/1/3/0/9/130969199/xoramevar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_a815240084df464bbf06a23760a80ae5.pdf?index=true
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_f9c09e4ca94d4ed6b5581abc1b5738a6.pdf?index=true
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_ba45da33577f494f916c183d23e24780.pdf?index=true
    • https://8035c368-62b5-4e0f-b07c-73fd2baf85c9.filesusr.com/ugd/2ee8d4_a84470f68f9e48d9be0fcf0c5f136083.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000173ab.bin
c39d0544640c4ac7156a35d162025120ececcf2c6ba5d0002afebb403c7b39b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x173AB 5432 bytes
font_01_sfnt_off000185c2.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x185C2 1800 bytes
font_02_sfnt_off00018e4f.bin
711f781d5c339ec508bb1c75742198fff87611340e62257fe8860710b95b9535		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18E4F 13156 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.