Malicious PDF — malware analysis report

Static analysis result for SHA-256 b38007889db2075e…

MALICIOUS

PDF

78.3 KB Created: 2021-04-05 23:39:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 49e4e6e3f8423ed1f3f81bb06a466e71 SHA-1: 545e6be536282851476a9e2160408d0fa2d751bc SHA-256: b38007889db2075e166799328daa8644d857ff1feeda3c209bad261dfab196f4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/123?utm_term=appium+scroll+down+android+c%2523 PDF link annotation
    • http://cocobeautybar.ca/hitman_2_sapienza_sniper_assassin_suit_onlyuk5ce.pdfIn PDF document text
    • https://jirukikemika.weebly.com/uploads/1/3/4/3/134310088/83e5061ce558.pdfIn PDF document text
    • http://omynutural.space/pobreza_urbana_y_neoliberalismo_en_mexico4mo9c.pdfIn PDF document text
    • http://novijixonusasu.mywebcommunity.org/boluwesunemewa.pdfIn PDF document text
    • http://tukazijib.22web.org/12407598017.pdfIn PDF document text
    • http://copyright-notice-ig.com/629650552982vuiz.pdfIn PDF document text
    • http://uspeh.icu/who_makes_diehard_gold_batteriesu0gnk.pdfIn PDF document text
    • http://witomemu.scienceontheweb.net/spoken_english_book_for_beginners.pdfIn PDF document text
    • http://fudazozotakaxal.mywebcommunity.org/how_to_postpone_medicare_part_b.pdfIn PDF document text
    • https://dotowukigirer.weebly.com/uploads/1/3/1/1/131163902/6959227.pdfIn PDF document text
    • http://dimax-matrasy.ru/mastercraft_crafting_and_building_download0hd2m.pdfIn PDF document text
    • http://cardioactiveuficiale.site/alain_de_botton_on_love_youtubexvqpd.pdfIn PDF document text
    • http://mobutadaxez.medianewsonline.com/51116670532.pdfIn PDF document text
    • http://metinozub.iblogger.org/cd_burner_program_free.pdfIn PDF document text
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/xulanabozef.pdfIn PDF document text
    • http://healthytrands.com/bopezuwosupedejaverudufidjnk4.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/fofeguj/evenflo_chase_car_seat_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/ritibifegadorat.pdfIn PDF document text
    • http://mekasesajiw.onlinewebshop.net/89056398417.pdfIn PDF document text
    • http://dawegad.rf.gd/bloons_td_5_apk_license_error_fix.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/libro_azul_aa_capitulo_1.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_off0000f0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B9 5300 bytes
SHA-256: 74a6a12d34eb5165676032026e03b9d251f76347015f27b48aa93322231e4bb6
font_01_sfnt_off000102b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B6 12240 bytes
SHA-256: d2e74308184a6f0061f8e658fbe54d2c8e571453c2804168cd9be27534e937a9

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