Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aedde9d0c0230d3…

MALICIOUS

PDF

80.1 KB Created: 2021-04-17 01:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5893204b01886488498543cb6f0bdc73 SHA-1: 21809aa437da23ce05a06d1aa8a9215f196a8dc0 SHA-256: 0aedde9d0c0230d3f7c617a2a5b6afce1d29b0b0d37b174948ef30ce7ed0aaa7
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and one primary malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded links and the primary URL suggest an attempt to redirect the user to a site that exploits search engine optimization tactics to appear legitimate, but ultimately leads to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mezovuduw.ru/strik?utm_term=why+does+my+lg+tv+keep+blinking+on+and+off PDF link annotation
    • https://sivenusa.weebly.com/uploads/1/3/1/1/131164431/ab2b92.pdfIn PDF document text
    • https://foraketarikovef.weebly.com/uploads/1/3/4/6/134608655/3f323c2ac39ae3b.pdfIn PDF document text
    • https://zagemixawidi.weebly.com/uploads/1/3/1/3/131378918/3663982.pdfIn PDF document text
    • https://cdn.sqhk.co/kisasizaro/hjQWyha/all-_in-_one_offline_maps_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/1wLyojN/pomojafajorom.pdfIn PDF document text
    • https://cdn.sqhk.co/pobojatizopa/20hchfw/subway_surfers_world_tour_mumbai_download.pdfIn PDF document text
    • https://degusatujetuz.weebly.com/uploads/1/3/0/8/130813325/xedunojafa_jutoguza.pdfIn PDF document text
    • https://bilagezapa.weebly.com/uploads/1/3/1/1/131163658/3bc8dd7003cecd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_abc98e7227ea4c9381ab6c3316b379a0.pdf?index=trueIn PDF document text
    • https://469ee322-798e-4c1d-9571-af6764901f97.filesusr.com/ugd/57169b_7777de0ae9ea48e28c1edbcb2c08d7aa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mukutud/pigubamuz.pdfIn PDF document text
    • https://29ce6865-365c-47c4-9f0a-635d6f965865.filesusr.com/ugd/0d6b77_6ca16941d6cb441892ce134ef6df5b2a.pdf?index=trueIn PDF document text
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_67e613d331a54bd9a62ba7322917dedb.pdf?index=trueIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_8e6fd74dfb3c4aadbe954c63a5dde3d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/63844015816.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/foxubugujedipilukubob.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/40896165004.pdfIn PDF document text
    • https://f395d2f2-f939-483b-815f-81062d4747ff.filesusr.com/ugd/be2697_4e1dce2582594d83ac03448417291cf8.pdf?index=trueIn PDF document text
    • https://9c33b4df-6f14-41ad-9e94-a3a23f7ed20d.filesusr.com/ugd/2a975f_dff5e50b56bf449aab35bae7b02017ba.pdf?index=trueIn PDF document text
    • https://57933e30-1e86-4cbe-ad2b-777cb72f9932.filesusr.com/ugd/235f1a_0174aa555168497b929ea2db1c17b9c9.pdf?index=trueIn PDF document text
    • https://50b7e5d6-ab0e-41ff-bbcb-47d024e5c277.filesusr.com/ugd/45d8ab_db5dbe26b6804bf4849edb01a14a4332.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/77267991829.pdfIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_f6462f4cb28c4c099a68f34ac25c01a7.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA48 5736 bytes
SHA-256: 0aab63d08e0e6912dc04c150385c7d738ebe56d187c69274bf79287a3f465fff
font_01_sfnt_off00010dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC1 10764 bytes
SHA-256: dacbc41197de28059e1fdfd8925578baaa210567a3aafd1ac5bf6af51fb53b00

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