Malicious PDF — malware analysis report

Static analysis result for SHA-256 abbf92ad2d057718…

MALICIOUS

PDF

104.2 KB Created: 2021-05-29 20:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 65035e70c9c81897e17bd0d1e5483d28 SHA-1: 5ef25308003dc074ecdc4c05cdc68fcab927bef9 SHA-256: abbf92ad2d057718ba33cee6fd4f3edfa27614feda49a89bc389f05e3d808b95
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • 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://botokaw.ru/strik?utm_term=making+stuff+cleaner+electric+cars+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459478/normal_603ac8477bf01.pdfIn PDF document text
    • https://difodofixipa.weebly.com/uploads/1/3/0/8/130814112/5d8cf7d5b9a9d9.pdfIn PDF document text
    • https://pukegivox.weebly.com/uploads/1/3/1/8/131856392/japivevawanigukujir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_60460d0bc5fac.pdfIn PDF document text
    • https://wofigazidiw.weebly.com/uploads/1/3/1/4/131437722/gereg_menidixa_govinabot_dopexitezoru.pdfIn PDF document text
    • https://kimukotepasa.weebly.com/uploads/1/3/5/3/135329918/vezid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402718/normal_6034eceeae904.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492250/normal_5ff2cd3361566.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490720/normal_5fc5857015df6.pdfIn PDF document text
    • https://kevanosum.weebly.com/uploads/1/3/0/9/130968994/2f1fd0e3a3d8.pdfIn PDF document text
    • https://luwusimoxoxaxa.weebly.com/uploads/1/3/1/4/131453453/80a5f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488581/normal_60646531c45a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9aeb002-8084-458f-9092-a7f971d4f3c6/fifajar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd0c5cd9-d93e-4ec1-8b59-6093b4916a18/how_to_do_the_lemon_detox_diet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6111c10d-053a-4e43-83b1-8552447748f1/trigonometry_booklet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69d593d8-91b9-47cb-b965-b7354da7f7a8/brand_identity_definition_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d55a900-8694-4b12-b415-fb2942c58088/73632201198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d145a10-d45a-4d66-8a94-7ed7407097f4/how_to_calculate_interest_on_maturity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ede64430-55f9-4d8e-aa85-a943399ff5cb/how_to_pass_the_servsafe_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2351fe-e660-465a-937b-ad5dabe053e6/1561866434.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C9 5304 bytes
SHA-256: 9c859fb79284434d5e9296c50c060908c64c08d09bb2b04d1c6f69a67cf7feff
font_01_sfnt_off00012bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF3 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off00013756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13756 10368 bytes
SHA-256: d6e7c16c85248b79925af141a593a7a4f8433ce802af0da607dda3717bb9f283
font_03_sfnt_off00015b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B3D 18104 bytes
SHA-256: 6fcfc83a01adf12574032bc95fff14367b4e460ec43205070d4af557fdb37630

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