Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb284f51f06a486…

MALICIOUS

PDF

86.8 KB Created: 2021-03-16 18:52:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 585fdc2d635a39ef765e67fe53d3a5d5 SHA-1: 9c3e8b87204eba5020200f0f15d531546539dfc5 SHA-256: 1fb284f51f06a486ed666f3ef55fd67b5a849489e8b1fc0b0f1439a31dcca262
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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.
  • 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://fokemale.ru/award?keyword=bailey+and+love+pdf+vk PDF link annotation
    • http://gatigade.iblogger.org/52442613601.pdfIn PDF document text
    • https://furimulu.weebly.com/uploads/1/3/1/4/131411024/baxawiponexubipetag.pdfIn PDF document text
    • http://leqqurint.online/mp3_player_online_shopping_lowest_price8voau.pdfIn PDF document text
    • http://50offstore.info/advances_in_behavioral_finance_thaler25g0x.pdfIn PDF document text
    • https://mojulikobamod.weebly.com/uploads/1/3/4/4/134488450/6983563.pdfIn PDF document text
    • http://sarepoxorak.22web.org/adobe_premiere_elements_free_windows_7.pdfIn PDF document text
    • http://yachts-4-sale.com/daximimajeloreredogitds1aj.pdfIn PDF document text
    • http://1xbet-registrat.site/5274178938012aev.pdfIn PDF document text
    • https://dowisapi.weebly.com/uploads/1/3/4/2/134266119/lazusajupiwitok.pdfIn PDF document text
    • https://padamiraniz.weebly.com/uploads/1/3/5/3/135305831/kasogub.pdfIn PDF document text
    • https://golizagizaziw.weebly.com/uploads/1/3/4/7/134701046/3938204.pdfIn PDF document text
    • http://dronextactical.xyz/what_are_the_maxims_of_lawxpky7.pdfIn PDF document text
    • https://bolefusugo.weebly.com/uploads/1/3/4/8/134868203/xenewubusifanolewo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://101c3d73-5e22-4da1-a203-a3a2a794ce88.filesusr.com/ugd/69a512_fff7b182914645af9faa6821a126d610.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c5e9810-3e97-4e02-9539-410f28148aff/rewofakisonagona.pdfIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_75d15180b7ac4b5a8427d12ce4623af6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/959494f1-9b52-46be-afaa-9e8f924920e0/xixofebugolenakixex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a356446d-e614-4d66-b8b2-5c12c7b620e0/html_and_javascript_example.pdfIn PDF document text
    • http://vozuxekeve.rf.gd/rutabulomabemolufukalu.pdfIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_f6aa6d5b74ed41a0b0c54a88a44bf8ea.pdf?index=trueIn PDF document text
    • https://3dd85f33-233b-4b3c-8e53-142bc8307eec.filesusr.com/ugd/8df890_45f185cb9e064c3dadc640c7465f4a73.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bae4ffa-8e2d-46d9-99a5-b28965baa6bd/vowizube.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D0 5036 bytes
SHA-256: 48a4d687f0ed8f6ceb2554372106b6835041f5a02ea9e3e0719b4b950b6abf3c
font_01_sfnt_off0001241e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241E 12136 bytes
SHA-256: f40b031cb49778be58bd5a561249c394bb177191d56b4bad185f1421c554badf