Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ae4024541c1295…

MALICIOUS

PDF

88.7 KB Created: 2021-04-06 09:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 458b28e4ef115c610dfee24076733fee SHA-1: 706c3fb4e7a49fcc735b91798194ee5ea123f1a4 SHA-256: 38ae4024541c12950654fd84ffa1b685d23e7ee65e7415524c46b23074862fa5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://golowaki.ru/award?keyword=afinidad+electronica+pdf
    • https://kiniwotonupit.weebly.com/uploads/1/3/0/7/130776343/9ed6e7b.pdf
    • https://cdn.sqhk.co/woragumokewi/gdAhggi/98144172144.pdf
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/217992.pdf
    • https://cdn.sqhk.co/gonolesuzam/clvjcij/premier_league_fantasy_gameweek_38.pdf
    • https://cdn-cms.f-static.net/uploads/4374369/normal_6022f94995c19.pdf
    • https://static.s123-cdn-static.com/uploads/4402533/normal_5fe3eb5bab8a1.pdf
    • https://mujabimebedegi.weebly.com/uploads/1/3/4/2/134234846/bakub.pdf
    • https://static.s123-cdn-static.com/uploads/4391893/normal_5fd03ac99e638.pdf
    • https://static.s123-cdn-static.com/uploads/4418368/normal_5ff5209049b5c.pdf
    • https://cdn.sqhk.co/loxexafetivu/gigyWUL/63610693441.pdf
    • https://cdn.sqhk.co/vopovaroxamo/gctCUBZ/zokitujivabodibarazotomov.pdf
    • https://cdn.sqhk.co/rubovadu/eicigh0/60508005786.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/9eb6e0dc-06ac-40f2-894a-7ca2e6a667ea/91112389107.pdf
    • http://numelini.epizy.com/nitofo.pdf
    • https://uploads.strikinglycdn.com/files/80e81b06-715e-4445-a66f-ab3307e52b39/30181149756.pdf
    • https://uploads.strikinglycdn.com/files/01ca6cef-6560-438a-bca5-720e73f79efd/77447814382.pdf
    • http://vuxotuketut.rf.gd/cloudformation_s3_bucket_encryption.pdf
    • https://uploads.strikinglycdn.com/files/ef5059ea-21a6-4e1a-a002-8bf4ea9daa0d/51049370843.pdf
    • http://fonunegemo.epizy.com/difficult_intubation_guidelines_uk.pdf
    • https://uploads.strikinglycdn.com/files/43ce4dff-3b99-48ee-a1b9-0a158c999f79/nivenuzapikijadax.pdf
    • https://uploads.strikinglycdn.com/files/835297a0-b4c0-4c30-bd9c-b8bc44c079da/how_to_charge_ravpower_rp-pb19.pdf
    • https://uploads.strikinglycdn.com/files/907fded9-295a-4d38-9726-9c4ebb897b1d/sagavowoxaxuvemapezeze.pdf
    • https://uploads.strikinglycdn.com/files/a1fd6c22-fea0-4080-b1c0-796ae43dc64c/do_baby_bjorn_bouncers_ever_go_on_sale.pdf
    • http://nofadokar.rf.gd/70985970234.pdf
    • http://tixefol.epizy.com/what_are_the_elements_of_quality_assurance_in_higher_education.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6ac.bin
99786418797fa4236421336cf7b267a5833ead6f2aa66a911c47162457017db0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AC 4748 bytes
font_01_sfnt_off000106c8.bin
24f48bd201ef65296945b1e323c57b29d412bd443490df16c28ec8a80b3e32b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106C8 12608 bytes
font_02_sfnt_off0001301a.bin
a1bdc24ec6dc0332449754d26803ee00bb6717469f64a18f47c680e22104396b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1301A 16080 bytes
font_03_sfnt_off000144d0.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144D0 4324 bytes

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