Malicious PDF — malware analysis report

Static analysis result for SHA-256 3384c076163e2903…

MALICIOUS

PDF

84.5 KB Created: 2021-03-23 05:55:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9711e95648d89eed5a16da0f4dbe2b57 SHA-1: deed97fcac88f987a36a8986913ea7f499a9117b SHA-256: 3384c076163e29032dac0db4936cc82991c622577dfa8a460f56e96add4df4e7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. One of the primary URLs, 'https://midufefew.ru/wix?keyword=kedsum+bluetooth+headphones+manual', is likely used to direct users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its direct intent beyond the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://midufefew.ru/wix?keyword=kedsum+bluetooth+headphones+manual PDF link annotation
    • https://kaketoxemi.weebly.com/uploads/1/3/5/9/135989659/damojapewojipi_dezesedi.pdfIn PDF document text
    • https://nuresoxak.weebly.com/uploads/1/3/1/3/131380504/4e1c33d0f5.pdfIn PDF document text
    • https://kelulove.weebly.com/uploads/1/3/0/7/130775366/doretafizajademiki.pdfIn PDF document text
    • https://ninobajoxakatud.weebly.com/uploads/1/3/4/7/134702009/6728820.pdfIn PDF document text
    • https://pitajuzijos.weebly.com/uploads/1/3/4/8/134885257/xovufutapuro_gekapuwe.pdfIn PDF document text
    • https://nobewiga.weebly.com/uploads/1/3/5/3/135315034/5754017.pdfIn PDF document text
    • http://liwokat.iblogger.org/8530294747.pdfIn PDF document text
    • https://deremufirig.weebly.com/uploads/1/3/4/8/134854029/7383918.pdfIn PDF document text
    • http://putifid.iblogger.org/75847692036.pdfIn PDF document text
    • https://suxegetolikas.weebly.com/uploads/1/3/4/0/134097713/8430418.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
    • http://pogifovemujure.epizy.com/borderlands_3_flak_skill_tree_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a89fdb6-665f-4f68-aa52-e750417ccb55/vishnu_sahasranamam_1000_names_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd122f8c-6b16-45a6-a2e5-5b516bfd7f10/computer_network_systems_and_database_administrators_salary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01eeb250-83b3-4eb6-a6be-b520826dc29b/pepolizonawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d5c8ed0-3881-4e82-b282-68f16add085a/88052667450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1715ac25-3a06-4ae8-a013-bfa965d11c3c/raforosaji.pdfIn PDF document text
    • https://e25b7b56-d8f7-44cb-9276-56428e53d1cc.filesusr.com/ugd/63f3e8_a69a48aa05ca43149ceffab8304e99e4.pdf?index=trueIn PDF document text
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_dbdbebd1d66543249d3ea4b2f725fd6b.pdf?index=trueIn PDF document text
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_d4e296f39a6143db9d2e6cc966395fd4.pdf?index=trueIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_4a8bbd533b9f462983b761ae1d920e93.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7f64be1-e7dd-423a-a026-f9f8530b40d2/beretta_a300_outlander_camo_patterns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c55001-2af4-4444-975f-db531cae381b/seramutaboverekabipajikes.pdfIn PDF document text
    • http://buzawasilugije.epizy.com/the_best_american_short_stories_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc730673-531d-43e7-adb7-0a7e72029179/lasiwosep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a94fa441-c604-46c4-9474-b6ce2a7d7af9/36797789942.pdfIn PDF document text
    • https://631ffb88-cf2d-4844-8d6b-9338a1b21cc5.filesusr.com/ugd/d24e6f_f6b6d35a87784655a4659f01fe0c29dd.pdf?index=trueIn 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_off0000ff4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4A 5048 bytes
SHA-256: 91d8048246a3e26c8867adaf0578897e68e7466e411045d65087c30db7f1fca8
font_01_sfnt_off00011049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11049 11024 bytes
SHA-256: 930d4b4c0eeddc9263bd3f870ca45c710c74295ae5b6517d320ef44d10fe7bf3
font_02_sfnt_off000135fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135FE 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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