Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ca5e0a29bf57b0…

MALICIOUS

PDF

119.3 KB Created: 2021-03-18 15:03:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a6a9bf090e03832cb4ed02f67f244a8 SHA-1: 59ab2287ec035b7f9b7ccee7b416dfe6565bb902 SHA-256: 64ca5e0a29bf57b0f6d46121fa77df8542bfe23d963d62aef008ad2128ae7e4d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in SEO link farms to manipulate search engine rankings or distribute malicious content. The heuristic PDF_SEO_LINK_FARM and the presence of multiple external URLs, including one flagged as potentially malicious (zajinet.ru), strongly suggest a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://zajinet.ru/wix?keyword=kangaroo+epump+manual+test
    • https://cdn.sqhk.co/gefimiwotux/ahf7Cvv/59918612059.pdf
    • https://static.s123-cdn-static.com/uploads/4446260/normal_5fe01b944e6c0.pdf
    • https://wixotofipexux.weebly.com/uploads/1/3/5/4/135400714/2090502.pdf
    • https://static.s123-cdn-static.com/uploads/4492253/normal_5fe1123d70b9b.pdf
    • https://bivuremopukojez.weebly.com/uploads/1/3/0/7/130740249/ligotu_sasinetodafa_nugideteko.pdf
    • http://memowelubi.mygamesonline.org/quotes_from_a_streetcar_named_desire_scene_1.pdf
    • https://static.s123-cdn-static.com/uploads/4453888/normal_60035bb8db377.pdf
    • https://cdn-cms.f-static.net/uploads/4488316/normal_6040bfb10d01d.pdf
    • https://cdn.sqhk.co/pajokiman/ajaGShh/werewolf_cat_kittens_for_sale.pdf
    • https://sexomimafu.weebly.com/uploads/1/3/4/3/134311134/nazegil-pukiratoli-pasidetawawiwov-vubope.pdf
    • https://dogenirifalalu.weebly.com/uploads/1/3/0/7/130775866/dadozenikowuva-jovesutusibis-mifexe.pdf
    • https://cdn.sqhk.co/towojutal/j6Sigjc/bagofuvedubebedifa.pdf
    • http://pejelurim.getenjoyment.net/4patriots_emergency_food_bars_reviews.pdf
    • https://muxavitegujun.weebly.com/uploads/1/3/1/6/131637584/buturodozefu_fulek_gofujanu.pdf
    • http://fiwisud.getenjoyment.net/elements_of_moral_philosophy_7th_edition.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1b2c4efd-c8eb-4b04-b26f-b9154d704720.filesusr.com/ugd/d3758e_bcc1870ae58f4fccbfdfc3087eef24c7.pdf?index=true
    • http://tanonarimunal.myartsonline.com/2012_hyundai_sonata_headlight_bulb_size.pdf
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_50b1d42ef3504f9fad3958335d2bc251.pdf?index=true
    • https://de74b992-0de1-402f-a2cc-438209b178b2.filesusr.com/ugd/2693ef_b119d8b7ff514621b87b166ad62a77aa.pdf?index=true
    • http://xowobovu.myartsonline.com/21697990839.pdf
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_e1e0a8d94c9749bcb2f11ece48847f63.pdf?index=true
    • https://ec08fec6-e576-400d-8504-372613838d3c.filesusr.com/ugd/57e0ce_7360c306fd15452cb5b707f0fa5bf93f.pdf?index=true
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_871e77c2a0f04fdc9ceb47598617b34c.pdf?index=true
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_76383871c9734dafada61b19686c0eec.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_off00017861.bin
d3cc057549b3d945793198fe80ebafbbc6f685ee4230636d82a4ab0fc12d2d15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17861 2260 bytes
font_01_sfnt_off0001821e.bin
53fe77aa76d6c6285a265a8c4b2ec3ce6fee56f4010de591a3582958db685291		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1821E 5108 bytes
font_02_sfnt_off00019372.bin
1502f9773fd2dbb0e631e84b33bbb01000700b595f43b329147e8a7a9a3cdcaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19372 19708 bytes

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