Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1198edfa1b72e2f…

MALICIOUS

PDF

73.9 KB Created: 2021-03-17 01:15:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 94592f4499bf02b65c2e9f1cfbcab22f SHA-1: b4c7b80c290ed687ac1376c755695e30eeeaa689 SHA-256: d1198edfa1b72e2f884946b12d6a7746ead18357c63d2667e86a628117d80dec
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file is detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous embedded links, many pointing to disposable domains, suggesting a link farm or redirection scheme to host malicious content. The document body, though heavily obfuscated, appears to be a lure related to a calculator manual, likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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://baarspo.ru/strik?utm_term=casio+fx-260+solar+ii+manual PDF link annotation
    • http://tersq.space/officiant_wedding_ceremony_script_funnykdqkw.pdfIn PDF document text
    • http://bonmarket.site/who_is_the_tiger_on_masked_singer_season_37x6ud.pdfIn PDF document text
    • http://fawaxifiwuzodil.scienceontheweb.net/capitalism_without_capital.pdfIn PDF document text
    • http://dobofozepop.mygamesonline.org/fudge_a_mania_free_download.pdfIn PDF document text
    • http://1cats.space/pamilabemoruv48po4.pdfIn PDF document text
    • http://myyshooop227.site/canon_rebel_t5i_manual_settingsf5m35.pdfIn PDF document text
    • http://chambre.xyz/emotional_intelligence_development_planweaja.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/975982145108fwv1.pdfIn PDF document text
    • http://help-ruleviolation.com/dota_2_clockwerk_guidetwtr2.pdfIn PDF document text
    • http://silewugebed.scienceontheweb.net/valesurepusubikog.pdfIn PDF document text
    • http://ayazshabutdinov.club/nufamad46dd.pdfIn PDF document text
    • http://vawadofofasip.getenjoyment.net/bohr_model_worksheet_answers.pdfIn PDF document text
    • http://kmikaerfs.ru/tezenupawofito3slx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/157e3d63-292c-402a-a42e-2281f14782e4/zimusesokufizusixivubeko.pdfIn PDF document text
    • http://fotizojorirepel.onlinewebshop.net/vodamolujam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ebd745e-85f5-4724-89db-668af17530f3/54560940300.pdfIn PDF document text
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_f457f476d8a9452bb63bbdf21412399a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a189ad81-26aa-4de1-a348-001f330aa384/42634831801.pdfIn PDF document text
    • https://11fe2947-f393-4df3-905d-f9f3730e834a.filesusr.com/ugd/b1b16e_8c48a5e44f7f440aaf636de41145d634.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f82c5c10-7f58-4087-b2e3-0f549ed4a5a0/ebay_coleman_hot_tub_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dafdf795-ae81-48fa-9062-954947777f71/craftsman_yt_3000_mower_parts.pdfIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_97c336357ea24d43a965488e950d116f.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_off0000e1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 5348 bytes
SHA-256: 1f7b5dca5929f3cd984fa4407c7c220f4a2ac37867e107d92849916d85497d81
font_01_sfnt_off0000f3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BB 10856 bytes
SHA-256: 71cde4757e55e8212355788a0377f26ccf498f0d1fddbc39f337a2914715747d

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