Malicious PDF — malware analysis report

Static analysis result for SHA-256 a952b9a1eacae079…

MALICIOUS

PDF

80.9 KB Created: 2021-03-05 11:56:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: dc3f48ad1fd1db690e732f76fcfe0b1b SHA-1: 26d6f9d0b7a2e241aa96f49a54f9d504672f3c14 SHA-256: a952b9a1eacae07943c5a0a20f31c618fdee4454f29060253aeb8ff0eec33858
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'lozipotod.ru', which is likely part of the phishing lure. Several other unknown reputation URLs were also extracted, suggesting a potential download or redirection chain. The document body, though heavily obfuscated, appears to be a lure related to accounting principles.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/award?keyword=what+are+the+four+principles+of+gaap PDF link annotation
    • https://cdn.sqhk.co/niporatibu/sZhiOEz/nibulubuke.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/hMtn9rh/megoroneferamojuzilaveb.pdfIn PDF document text
    • https://cdn.sqhk.co/bokapapukopa/I3ijSjc/moist_pound_cake_recipe_with_oil.pdfIn PDF document text
    • https://cdn.sqhk.co/sugezigo/gcihAyh/xipafajesekokeri.pdfIn PDF document text
    • https://cdn.sqhk.co/bidomutarili/igjfgiU/dudosirukotiza.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/ftnZWzm/data_worm_app.pdfIn PDF document text
    • https://cdn.sqhk.co/nitagalut/YfRz9jj/halloween_makeup_photo_editor.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/zagapaxa/babaxuponuvezasisar.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/aap_coding_fact_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1db700d3-fce5-4a9c-b989-095b087f8e93/what_is_the_best_anger_management_book.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/47783388436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b7d7a5-4838-42ba-89fc-a9ffed0ac2d0/creative_sound_blaster_x-fi_surround_5.1_pro_driver_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/makalah_bioplastik.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/rilavabisuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f05469a6-2221-4c31-b149-8d11a691674c/how_did_the_industrial_revolution_affect_literature.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70715f60-62be-4113-8cbd-fb2c2b624ae7/felomanarasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79f3cef3-d3b3-41dc-a9ca-f4dde2f9b2f7/pobofowilumavakur.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/ibps_po_online_form_filling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0e977bc-fea3-4fd1-a0cc-19eaf641485a/51700457081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/691bf76d-9f84-49ad-8f67-c3315de51952/tevowejololatopuvana.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/3419982721.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/how_to_read_egypt.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_off0001001f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001F 5288 bytes
SHA-256: 78771132193c843fe832aaa7c896654a9b9c5ced120cf678dbb4a2e2afabdf69
font_01_sfnt_off0001122a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122A 10532 bytes
SHA-256: 4c70d08147cbc428770ae65eddd9f32f10f21bfe14cddbc7680895cca67229d3

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