Malicious PDF — malware analysis report

Static analysis result for SHA-256 e612f5aa80487e70…

MALICIOUS

PDF

68.8 KB Created: 2021-03-18 19:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97cba53064fadfc13476ff88f5478fd3 SHA-1: 7d5a646e72b4ed937b73c193e9eb59304a396530 SHA-256: e612f5aa80487e70f816da5d0ed12e53b4d55fe20eb79ded04765c36ed8431c0
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though partially obfuscated, appears to be a lure related to technical support or information retrieval, designed to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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
  • 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/strik?utm_term=where+is+the+wps+button+on+my+netgear+router+c3700
    • http://rezotu.xyz/52159686005r1kg9.pdf
    • https://zegesunipatobas.weebly.com/uploads/1/3/1/3/131379774/nenin.pdf
    • http://dragonflysagewellness.com/craftsman_lt1000_specsp6dl8.pdf
    • https://cdn-cms.f-static.net/uploads/4402720/normal_603a10e723100.pdf
    • https://cdn.sqhk.co/mifebemige/hvlxuG0/resij.pdf
    • http://899themes-demo.ru/68156058817xga4r.pdf
    • https://kemosufasegu.weebly.com/uploads/1/3/4/3/134348140/5170755.pdf
    • https://wigizidipi.weebly.com/uploads/1/3/5/9/135984633/7636068.pdf
    • https://cdn-cms.f-static.net/uploads/4384461/normal_6048a100744cf.pdf
    • https://kawavaturitavo.weebly.com/uploads/1/3/5/3/135321378/f46fa3b5ba9d856.pdf
    • https://lonunirixug.weebly.com/uploads/1/3/2/7/132710494/2605914.pdf
    • https://nupewaxupojiga.weebly.com/uploads/1/3/4/0/134042887/pefiwala_ramebo_butiluwosozexa.pdf
    • https://cdn.sqhk.co/zogowefu/ibghDgd/fireboy_watergirl_forest_temple_walkthrough.pdf
    • https://rafutukeri.weebly.com/uploads/1/3/1/4/131453201/c04ac1ab74.pdf
    • https://cdn.sqhk.co/zezetemirag/eTVOup7/peponuw.pdf
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/wefatenizigigubeson.pdf
    • https://minileponefij.weebly.com/uploads/1/3/1/0/131070526/gutixusorido.pdf
    • https://cdn.sqhk.co/sikudile/TicheGJ/ios_launcher_apk_mod.pdf
    • http://madusotiju.22web.org/cisco_system_vpn_client_windows_10.pdf
    • https://cdn-cms.f-static.net/uploads/4505096/normal_60222300257e7.pdf
    • https://cdn.sqhk.co/firavibaw/gjUhgFx/38854642937.pdf
    • http://gesizuwumog.iblogger.org/jinanosonet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gobofitis.epizy.com/does_living_and_non-living_things_depend_on_each_other.pdf
    • http://vogevobiletopot.epizy.com/90366520161.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cea8.bin
f5a1ef01f5a95335bc97e84b33d983b004807c55050be0f338c93a026b743c3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA8 6048 bytes
font_01_sfnt_off0000e33e.bin
5b046f0b6309491c5816d88e9b166d1a6e486b5785bb7a873b14beb6c899b0b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE33E 10020 bytes

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