Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c45b4f7d45fcb64…

MALICIOUS

PDF

106.8 KB Created: 2021-04-01 11:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 240bd849f8a035e789812828b77b0213 SHA-1: ceabea6e4231ec509bbfb8445e9c32e378d59c6b SHA-256: 1c45b4f7d45fcb64324689b6a9427423633b5677d20ca93e3ccccdd8633c414f
136 Risk Score

Malware Insights

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

The PDF document contains a high-confidence heuristic indicating it's a phishing lure, specifically using an SEO redirector. The embedded URL 'https://nipisod.ru/award?keyword=bilingual+figurative+language+processing+pdf' is directly associated with this phishing attempt. While no scripts were explicitly extracted, the nature of the PDF and the detected heuristics strongly suggest it's designed to lead the user to a malicious site for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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://nipisod.ru/award?keyword=bilingual+figurative+language+processing+pdf PDF link annotation
    • http://rowewuxeg.getenjoyment.net/medical_tourism_questionnaire.pdfIn PDF document text
    • http://zoxovimukanig.22web.org/extreme_ownership_how_u.s._navy_seals_lead_and_win_new_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/xatuxazaz/idkjfzN/ruweves.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/hid93ij/45285772939.pdfIn PDF document text
    • http://baderakavakuf.22web.org/10th_english_book_back_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/ribovonubod/Vibhjgh/redream_emulator_premium_free.pdfIn PDF document text
    • http://pedurovizosika.22web.org/64277361003.pdfIn PDF document text
    • http://nevezewikuzi.iblogger.org/12165112153.pdfIn PDF document text
    • http://nawavidosuk.medianewsonline.com/jujesafoxep.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
    • http://xibiwoziveva.epizy.com/bhojpuri_bhakti_full_hd_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/coaching_psychology_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/chit_fund_calculator_software_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbb58a77-9458-464f-9e25-48f7bd4b1d95/honeywell_thermostat_blank_ac_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebbc2bc6-8b69-428e-aebd-481112ecd184/how_to_sample_itunes_songs_in_garageband.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/3dmark_2017_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/weber_smokey_mountain_14_brisket.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/headliner_novinews_achievement_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce989246-6e2a-43b6-80cf-a709bb07c997/ipod_touch_5th_gen_second_hand_price.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/51576520932.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/menipipusejaz.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/you_are_my_everything_piano_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a8b4033-877c-4ec2-9fa0-4557d913a051/how_much_is_a_porsche_928_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/how_much_does_a_5_ton_trane_ac_unit_cost.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_off00015776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15776 5312 bytes
SHA-256: aabf7d09c9c305822ad999bfd4e8d46337b1e3d4056cc6dc8ca22db15b8c7912
font_01_sfnt_off00016993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16993 11548 bytes
SHA-256: 180c8bf079ab2513077f85e686a0745acf96df99a2d3812c93925279dba51217
font_02_sfnt_off00018f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F5E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2