Malicious PDF — malware analysis report

Static analysis result for SHA-256 a509d32d0a227eb8…

MALICIOUS

PDF

87.2 KB Created: 2021-03-18 10:30:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e857dfdeda264a98d659883a2e4109e7 SHA-1: 5470531e6c28e5d8f255fe587df979f32d3677a7 SHA-256: a509d32d0a227eb894a634866edb4ab103a7dd6785f9ff62a25c9ea4814c56ab
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/award?keyword=estrus+synchronization+in+dairy+cattle+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486036/normal_6053012e719dc.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/gadotobatupilupux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448991/normal_6001c8cfb9c16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469641/normal_5fec4f6c0f205.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402956/normal_5fe134d4d812f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415930/normal_5fd95b706bea1.pdfIn PDF document text
    • http://moxejukube.22web.org/zulideradereset.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/8790828914.pdfIn PDF document text
    • http://lorubuxetorifa.medianewsonline.com/how_do_i_turn_on_a_mac_wireless_keyboard.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/mufajakejebevotoziw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367920/normal_5fdd45790fe10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465555/normal_60318f803a905.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fatavetotujel.onlinewebshop.net/xegepedudi.pdfIn PDF document text
    • http://guzovoda.rf.gd/72589981391.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_1606619961504c03bdd3fb8106c540df.pdf?index=trueIn PDF document text
    • http://bezopiwuzalobit.rf.gd/xalitupijoj.pdfIn PDF document text
    • http://lipeporo.onlinewebshop.net/convert_scanned_to_word_abbyy.pdfIn PDF document text
    • http://sidoroxeroleven.epizy.com/wilipovax.pdfIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_483bb9101c7b482582f11b076784d256.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF831 5352 bytes
SHA-256: 01ec849c5d5a2381fe9c0f450c44d858e3e10395e2e57186936f455925e0d47e
font_01_sfnt_off00010a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A72 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00011300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11300 10800 bytes
SHA-256: b4e4eb7547e067dab186b2ef1fae7efa8fa2dbc6c5d982ba0159d00772530dc6
font_03_sfnt_off00013830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13830 16492 bytes
SHA-256: ec6bc39fcadf20ce6abbc61938007e1725e8a75ac401f69b839f0d7a9943f959

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