Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f45a11e1826491…

MALICIOUS

PDF

84.6 KB Created: 2021-03-15 04:57:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 60043b412aa03113b1d9febd5dddd82c SHA-1: b7ef27c77485eb8bedb43d6b797986fcebac7585 SHA-256: c5f45a11e182649165a80cca9773ef4147eb1911e3c96edd7e1b5ba82841f4c0
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable domains and potentially malicious hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://seumenha.ru/strik?utm_term=tallest+girl+in+jamaica PDF link annotation
    • https://cdn.sqhk.co/kulukopupiw/licl4gg/my_cloud_home_login_pearson.pdfIn PDF document text
    • https://cdn.sqhk.co/magatile/gXvghDS/oceanhorn_2_walkthrough_11.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/AhgDCjd/25719942951.pdfIn PDF document text
    • http://kihepc.xyz/the_united_states_constitution_scavenger_hunt_answer_key_history_with_mr.emycup.pdfIn PDF document text
    • http://idealslimitaly-official.site/garikekojusefawekida50ux7.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/crgdovx/games_similar_to_a_girl_adrift.pdfIn PDF document text
    • http://tryse.xyz/how_to_make_a_large_crochet_circle_into_a_squareoflms.pdfIn PDF document text
    • https://cdn.sqhk.co/jerizukop/hhoAbgh/24736984541.pdfIn PDF document text
    • http://tomogorman.com/434090805904wyuw.pdfIn PDF document text
    • http://testrun.ru/diwigagasoxefinuvg568a.pdfIn PDF document text
    • https://cdn.sqhk.co/jufenakajo/jhagihc/lejemigemoxativol.pdfIn PDF document text
    • http://naturfresh.fun/symbol_scanner_settings_barcode90vpl.pdfIn PDF document text
    • http://lienforkid.com/30639106044xrd0k.pdfIn PDF document text
    • http://lg-copyrightforms.com/49056609456etvjy.pdfIn PDF document text
    • https://cdn.sqhk.co/rumomezojeku/Igfjcjc/povidokuvaporurabosogi.pdfIn PDF document text
    • http://mbfsopg.com/33218562936ythvw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2f922ba3-8941-41e8-a81d-9a42c4188fba/58814173098.pdfIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_63c8a48472b74cd18db39737f0db7521.pdf?index=trueIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_4f0d31f4ba3d45509f84f91ab97fc312.pdf?index=trueIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_9acc3d06dcf945acafc837802d16af5f.pdf?index=trueIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_187deaadddcc40868ac58b269e249155.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcb5e59c-1afe-41f4-bae2-efb060e72c5c/lokujesamajopusadosovevot.pdfIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_acab75a2116d42388401d4dab0e78bae.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4155cc6-f75d-4a97-96eb-2a17bf2cf5d6/tekinegiwawatokisipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d5cf314-f20d-499b-bd08-410497e6d81c/dewalt_dwe7491rs_dust_collection.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE23 4820 bytes
SHA-256: fa23b36dcad894d2688d65be528462f09450675a7b2e3ae693c2921635f028be
font_01_sfnt_off00010e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E66 11784 bytes
SHA-256: 69f2b3f134e349026f9972fd21b6da70449033ce6998ebca3de5016a9cb24700
font_02_sfnt_off0001357c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1357C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333