Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0cbcee0f7fbfc7c…

MALICIOUS

PDF

72.4 KB Created: 2021-06-13 09:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f51438eda12bc64369b5ae3f6ede10bf SHA-1: e3364921bc9e90ba1c2fce90917e9c87b0909fb5 SHA-256: e0cbcee0f7fbfc7c16680b5d5971fbc527573e42de0148b6f5f8b840b0de684b
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous embedded URLs pointing to a link farm, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The presence of external URIs and the link farm heuristic strongly suggest a phishing or content distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/pbw?utm_term=strive+for+a+5+ap+psychology+pdf+answers
    • https://cdn-cms.f-static.net/uploads/4484624/normal_60ba99bba2d18.pdf
    • https://jakipafowikodo.weebly.com/uploads/1/3/1/0/131070805/2296ace.pdf
    • https://cdn-cms.f-static.net/uploads/4460243/normal_601b5043d9fc4.pdf
    • https://cdn-cms.f-static.net/uploads/4488339/normal_600bb3394ad0d.pdf
    • https://majosipodolonax.weebly.com/uploads/1/3/0/8/130814003/9770661.pdf
    • https://static.s123-cdn-static.com/uploads/4370540/normal_5fceabef2a274.pdf
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/d6dccc64188b.pdf
    • https://cdn-cms.f-static.net/uploads/4427077/normal_6016fa13a1305.pdf
    • https://tawatoxox.weebly.com/uploads/1/3/4/0/134018263/kizevokoxorizupaguso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bujolajoxek.pbworks.com/w/file/fetch/144821268/37640685978.pdf
    • https://uploads.strikinglycdn.com/files/2bb46836-106b-477a-91e0-0515381d73da/58238922118.pdf
    • http://pokatufaxi.pbworks.com/w/file/fetch/144421191/rules_of_exponents_n.rn.1_worksheet_answers.pdf
    • http://kolasotosexu.pbworks.com/w/file/fetch/145098219/wemitunixaxogurozux.pdf
    • http://tebejeloxid.pbworks.com/f/how_to_treat_a_sick_green_cheek_conure.pdf
    • https://uploads.strikinglycdn.com/files/16edad14-9317-46d0-88c3-33afd6091d70/ge_healthcare_office_in_india.pdf
    • http://gazoridixilu.pbworks.com/f/onn_bluetooth_earbuds_charger.pdf
    • http://mugobug.pbworks.com/w/file/fetch/144945108/savutuli.pdf
    • http://mawasuwov.pbworks.com/w/file/fetch/144701715/5623586934.pdf
    • http://gopamux.pbworks.com/w/file/fetch/144975405/smt_strange_journey_redux_cia.pdf
    • http://nukisefel.pbworks.com/f/gumolibuzugubuniz.pdf
    • http://xewubamefa.pbworks.com/w/file/fetch/144678549/71336595979.pdf
    • https://uploads.strikinglycdn.com/files/ea0eb1f3-1c91-4f26-8896-934ab8708893/can_you_be_a_bodybuilder_on_a_vegetarian_diet.pdf
    • https://uploads.strikinglycdn.com/files/311c5bdd-1220-497f-905b-f3419b2796e0/10141272861.pdf
    • https://uploads.strikinglycdn.com/files/178f3f22-4f02-4850-811f-d5cc37ff5c83/wosuxata.pdf
    • http://wisarazed.pbworks.com/w/file/fetch/144465927/modsy_style_quiz.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_off0000d99c.bin
fa8aa47c21797206b7174c0beb01580d19d828777dd4ff67d8bf8ceff335f684		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD99C 5900 bytes
font_01_sfnt_off0000edc8.bin
f044456a48041d40a702c60a3a1b0cc141ad02a46a0ee04b982f171faafe8416		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC8 10660 bytes

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