Malicious PDF — malware analysis report

Static analysis result for SHA-256 d163497af3f01713…

MALICIOUS

PDF

88.3 KB Created: 2021-03-22 12:21:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3b1ba8a73647fd29fb084fd9d5785747 SHA-1: aa7be04f44632d7c9cf49377d4731e8f8f7062eb SHA-256: d163497af3f01713a3101e07fc0cfaa3f62f7b1360d4535cc87f6ce58d1df021
146 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The 'SE_CALLBACK_LURE' heuristic suggests the document is designed to trick users into calling a phone number, consistent with callback phishing or tech-support scams. While no scripts were extracted, the presence of external URIs and the overall detection suggest it may be part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jumiwimov.ru/123?utm_term=disputing+items+on+credit+report+no+contract PDF link annotation
    • http://midomut.iblogger.org/occupational_health_and_safety_book.pdfIn PDF document text
    • http://1xbet-registr.site/84836065306mftcu.pdfIn PDF document text
    • http://djami.ru/adnan_sami_song_bestwap10poo.pdfIn PDF document text
    • http://nanolenka.xyz/kazimojizesomodibokimak1kce.pdfIn PDF document text
    • http://hookup756.fun/xokowobalopipazadud3rnye.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://rupiroliwon.epizy.com/86509519336.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/walter_benjamin_theses_on_the_philosophy_of_history_explained.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab117f6-4b9a-4a98-bac8-ffaa6afc18a8/79906027875.pdfIn PDF document text
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_d9f59aa27991493ea560c03cd213e548.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/zewisofiderowop.pdfIn PDF document text
    • http://pudubekij.epizy.com/boriwomitigesukinobe.pdfIn PDF document text
    • http://girifej.epizy.com/cucumber_planting_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6db7f811-8cc8-4e91-94c5-10ca352b02ed/sony_android_led_tv_32_inch_price_in_bangladesh.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/dukimesiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6c5c11a-14ec-41ed-863b-278ac515d955/northouse_leadership_8th_edition_year.pdfIn PDF document text
    • http://zapuvem.epizy.com/oxidation_reduction_balancing_worksheet.pdfIn PDF document text
    • http://juxudawalugevop.epizy.com/xuloleforijokej.pdfIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_28e52047b5bb4d41bf888770c265b0ed.pdf?index=trueIn PDF document text
    • http://tosivasode.epizy.com/sony_blu_ray_player_software.pdfIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_7f9364107fef4068a5e19a84d3f9c8fd.pdf?index=trueIn PDF document text
    • http://bewomad.rf.gd/7250639034.pdfIn PDF document text
    • http://gogolozumer.epizy.com/zimiverilogirozajor.pdfIn PDF document text
    • https://f2fffe36-c7b4-4b88-9608-518dc6c14750.filesusr.com/ugd/950b2a_5a2c7839a3aa4301be2a9a1e58ecdb82.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/livre_guide_voyage_europe.pdfIn PDF document text
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_27ba754005f74fc89c3a1586bf7a737d.pdf?index=trueIn PDF document text
    • http://dizebumik.rf.gd/vapelokasas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/018c9f14-7fca-414b-b505-5ab34d7453ee/yamaha_rx-a730_no_sound.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/napuvivatikixatodadewowos.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_off00010ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA6 5240 bytes
SHA-256: 95b23708db31c588613bb3974a78f3aef0348b834638e22f61979232a5e07fc6
font_01_sfnt_off00011d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D58 11660 bytes
SHA-256: 9fc4b8c15dcd3fc8e85a64c97fcb4f42721dd768473bb1a47ef3863efe6e442f
font_02_sfnt_off00014520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14520 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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