Malicious PDF — malware analysis report

Static analysis result for SHA-256 287f5afa19ce9d38…

MALICIOUS

PDF

91.7 KB Created: 2021-03-16 18:59:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b55a1f605de9fd40af7374892ad445bd SHA-1: af5a2d1907510158af09b767e3c1ecfcb8ad5c63 SHA-256: 287f5afa19ce9d381b48e0418c14a44934df68d50b02f043325fe97045cf30ed
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to a link farm hosted on disposable domains, suggesting a phishing or malicious redirection attempt. The primary malicious URL identified is https://druttle.ru/award?keyword=industria+alimentaria+en+el+peru+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/award?keyword=industria+alimentaria+en+el+peru+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446931/normal_603c1221a57f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404112/normal_6035b5a061fb3.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/51860883326.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/nanirovokikajeza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478946/normal_5fcda7f33483c.pdfIn PDF document text
    • http://pafugiwerokamez.iblogger.org/is_the_jeep_3.6_pentastar_a_good_engine.pdfIn PDF document text
    • http://gopubewigofopa.iblogger.org/chamberlain_liftmaster_elite_series_manual.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/fcb7ae93-e11b-435e-ad7e-77e153c407c8/58416284997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/174b0242-7ec3-4606-9d59-1507ee1d984e/hoover_dual_power_max_belt_fh51001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdecabc3-923d-44c1-a9aa-2f956657061b/gemolatazesegazozilebuneb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fca1644-e3b9-4743-82cd-ebf5fada7c76/motorola_g6_play_indigo_review.pdfIn PDF document text
    • http://wekapalipewux.epizy.com/jinawosuxunasamober.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e34d546a-c556-402f-959f-cc6a9accd088/what_intermolecular_forces_are_present_in_pentanol_and_water.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/lojerixoperube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3967a82c-3544-4c4e-bb1f-f09de35236b4/how_to_pair_motorola_baby_monitor_mbp483bu.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/hypertensive_emergency_guidelines_jnc.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/automate_the_boring_stuff_with_python_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91eb591c-733e-498e-8cb1-0c26c01129e1/77362924953.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/super_pose_book_vk.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/hoi4_battle_plan_guide.pdfIn PDF document text
    • http://peruroz.onlinewebshop.net/76586759138.pdfIn PDF document text
    • http://rafodize.rf.gd/les_quatre_accords_toltques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc99e4f-5343-44e5-9558-07e5d6749ab2/ponazudimofagomed.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_off0001197c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197C 4896 bytes
SHA-256: 1cd29d80c4c6111b1cdc5ef108e3c2de9f6698f7b858783797ad0d4ea06b44d2
font_01_sfnt_off000129f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F7 12340 bytes
SHA-256: 3181fb49e6d52ee8ea243fbf522b4241894361b8fd72ed09f89510918a990ca5
font_02_sfnt_off00015165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15165 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f