Malicious PDF — malware analysis report

Static analysis result for SHA-256 08356b6cbad50c26…

MALICIOUS

PDF

79.7 KB Created: 2021-03-08 23:17:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1860046a5a4d1db26ba761fd0a5f0edf SHA-1: 9c7ef221c5fdf9d0c47e027c20525f03cfb9ef61 SHA-256: 08356b6cbad50c26954eb39cc3a9d389946b95319c94abe2451bc706c8e5925f
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it is a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mezovuduw.ru/award?keyword=7+day+flat+belly+diet+plan+pdf PDF link annotation
    • http://big-ita.space/25563428323d2lti.pdfIn PDF document text
    • http://draiwenstore.online/feral_dps_guide_8._08seg6.pdfIn PDF document text
    • http://copyright-central-media.com/mobakefojulemimegisvtb0p.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/54716345898.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/29432983213.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/seriposuj/animal_abuse_reporting_laws.pdfIn PDF document text
    • http://xafonabikox.rf.gd/22128234591.pdfIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_29c1ad70700a4a8dbfbee26a85435349.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/meludav/rozadexone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ca16919-82a1-425c-b1c2-dc147b51e581/fitbit_charge_3_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b50e998-41e3-489b-b46f-a2d2ac319e11/jujofedoluvazikepokad.pdfIn PDF document text
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_7942c90764de44f5909d356320985526.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xozeb/83621507756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aec3247-a03d-4e3e-b34f-a84f5aa7adc3/sony_str-dh720_specs.pdfIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_e6761125344c4997a106e273ec72f98e.pdf?index=trueIn PDF document text
    • http://wuwepapose.epizy.com/wepinarewebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fefd90b-211f-4a05-8407-2dc06fa26229/coleman_presidential_2_furnace_pilot_light.pdfIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_97e2b0326c724f13b347ec4274469af2.pdf?index=trueIn PDF document text
    • http://sebokegekesuded.atwebpages.com/2000_ford_ranger_mpg_v6.pdfIn PDF document text
    • https://68a74d12-89ac-4a94-b826-09ad332a30bf.filesusr.com/ugd/1a0392_7cf1a6210a5c43089a92409bf2cefbfc.pdf?index=trueIn PDF document text
    • http://melubofagediw.rf.gd/sheet_music_armband_tattoo.pdfIn PDF document text
    • http://baxajuzurajuj.rf.gd/formule_loi_binomiale_1ere_s.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/vazonaba.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2C 4988 bytes
SHA-256: 4555e4f4d3913fd4625941ecc82c463659fe61ca4e72c8075123641a37121239
font_01_sfnt_off00010d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4A 10448 bytes
SHA-256: 4469dd1821390841bd4590bc492594166ac930d7f32819e3febcee7e98b61a9f

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