Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad7ac00ba8cad0e…

MALICIOUS

PDF

77.6 KB Created: 2021-04-04 16:34:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 55b7d6c523b2f8c0aeb37ba61aa4f7a9 SHA-1: a7908e18e58ef442cd603187fc7328bba507fb1b SHA-256: 1ad7ac00ba8cad0e947ac7b49a7268dc29a7a5f6ae5f9a298ba1503ec602817b
212 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, specifically using a fake download button and linking to an SEO redirector. The primary URL identified is 'https://gimoguvi.ru/strik?utm_term=premiere+pro+free+download+full+version', which is part of a link farm. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 8

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gimoguvi.ru/strik?utm_term=premiere+pro+free+download+full+version PDF link annotation
    • http://doxedisipi.scienceontheweb.net/babylon_5_ships_of_the_galaxy.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/croup_treatment_guideline95w4b.pdfIn PDF document text
    • http://natfreshik.fun/beromuwanimugefiruzaz7il57.pdfIn PDF document text
    • http://vvinorama.website/wii_u_emulator_macoso7e5m.pdfIn PDF document text
    • http://bajesiradevo.getenjoyment.net/ccdp_download.pdfIn PDF document text
    • https://tizonitiwu.weebly.com/uploads/1/3/4/7/134734793/miruwubawudufopebop.pdfIn PDF document text
    • http://podarokinsta.online/sadibudukadelolq4how.pdfIn PDF document text
    • http://premiumpornclips.com/essentials_of_statistics_for_the_behavioral_sciences_10th_edition_free8hn8t.pdfIn PDF document text
    • https://rifunojurese.weebly.com/uploads/1/3/4/3/134370075/pijora_lijuvoniwef.pdfIn PDF document text
    • http://zubosoxi.22web.org/sewing_machine_amazon_brother.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kodibonu.rf.gd/literal_language_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/what_is_the_name_of_the_evolutionary_history_of_a_species.pdfIn PDF document text
    • http://sixeres.epizy.com/diagnostico_de_anemia_gestacional.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/betternet_premium_apk_mod_free.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/97660712886.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/epidemiologia_veterinria_thrusfield.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/duvetokitovuderuwuw.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/six_sigma_green_belt_free.pdfIn PDF document text
    • http://guradewididexep.epizy.com/net_framework_version_2._05727.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/huawei_sun2000-_36ktl_datasheet.pdfIn PDF document text
    • http://pusolegulijased.rf.gd/16836991488.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/28678888227.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/cell_size_and_diffusion_lab_answer_key.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_off0000f2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F1 5340 bytes
SHA-256: 39d3b3ffe95e8bc7bfedd72e35b689fdddbf2a17a2b5ecfc0c3e9356a3b38f3c
font_01_sfnt_off0001051a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051A 10436 bytes
SHA-256: 8037e8c07de179e52a5f725a99e04ccb0712b6bd6b82fa23e96a840ced74c954