Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc38b5df038b57e…

MALICIOUS

PDF

77.3 KB Created: 2021-03-27 15:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 033ce72b7912f75743895a298abf8a74 SHA-1: daf672f198dd054ecdba5febbcf82848f69b9b31 SHA-256: 1fc38b5df038b57e87ccdff487c5a69a2032f2782ce26ea870b1ea00d243dd95
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with at least one, 'https://dugedepap.ru/123?utm_term=arya+2+malayalam+movie++mp4', appearing to be a lure related to a movie search term. The presence of external URIs and the link farm heuristic suggest an attempt to redirect users to malicious sites. No scripts were extracted, but the overall structure and heuristics point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://dugedepap.ru/123?utm_term=arya+2+malayalam+movie++mp4 PDF link annotation
    • http://dapajurop.mygamesonline.org/wafasibawojavoxoxuwe.pdfIn PDF document text
    • http://ripugusulufiluj.getenjoyment.net/cinematography_books_download.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/50655444447.pdfIn PDF document text
    • http://dezlice.ru/237373642967rs8s.pdfIn PDF document text
    • http://xilenemivagola.mywebcommunity.org/19752197279.pdfIn PDF document text
    • https://cdn.sqhk.co/visesefider/jdHGmgi/promo_marketing_video_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/zuboxizip/Yhigdhf/campaniform_sensilla_in_insect_legs.pdfIn PDF document text
    • http://lagejarejitog.mypressonline.com/statistical_machine_learning.pdfIn PDF document text
    • http://yewes.fun/51963120171r556g.pdfIn PDF document text
    • https://cdn.sqhk.co/fusaduxuw/3jeeYgd/65895338914.pdfIn PDF document text
    • http://chelamela.org/how_to_fix_my_vizio_tv_flickeringubut0.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/70cdce6b-ce21-4c5b-b85e-6add4d4e4c50/craftsman_lt_1500_carburetor_adjustment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3dd26aa-faef-4d17-8c75-3c585e96a982/6454813187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b98183af-3961-403c-ae83-56316ae33044/7548821249.pdfIn PDF document text
    • http://totuxivez.onlinewebshop.net/how_much_weight_is_3000_calories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab18a66b-e9b7-4462-b072-fc0227d2ffac/lejaforarivo.pdfIn PDF document text
    • http://lawaxisagiwog.atwebpages.com/how_does_maze_runner_2_end.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2f98d9a-c600-4222-ae42-14d12053b5eb/fefezimijok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a07821-44ca-42dc-95b8-31ed349d3585/doctor_sleep_cast_wendy_torrance.pdfIn PDF document text
    • http://jubogaju.atwebpages.com/can_you_use_a_water_flosser_with_braces.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b5c8c54-23a4-48b3-a90b-b00769c95d8d/polisujetedadimosupuwuler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/677df81d-2f9b-49df-a26a-01f643d4d1d0/28497605502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bddafc14-54aa-4cb2-8f8e-fa31d95f49df/76510765355.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/galileo_bertolt_brecht.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_off0000e43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43C 4760 bytes
SHA-256: 13abf28744c73653ddc6b7f2bf57b6f4df79e5ed6244c94df74eec09567fb8f6
font_01_sfnt_off0000f471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF471 10880 bytes
SHA-256: 37e355d586351d80ade7d8689071c27a189bca87ed02f5c3882de8247254600c
font_02_sfnt_off00011992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11992 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3