Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3561ea80d665e70…

MALICIOUS

PDF

96.1 KB Created: 2021-03-15 04:16:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 323b43b78020fba43a8f469f42cfe6f1 SHA-1: d38b3c57e15fdab63e05f0efb7dab623599b7040 SHA-256: c3561ea80d665e7095cc61081dd2c880fec643ad44f4c48d08e0442f6c78963d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a suspicious domain, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, contains text related to a calorie query, suggesting a social engineering lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=how+many+calories+are+in+a+matcha+green+tea+frappuccino
    • https://static.s123-cdn-static.com/uploads/4371025/normal_60051780f4136.pdf
    • http://jilet1.club/persepolis_book_overviewoij8r.pdf
    • https://cdn-cms.f-static.net/uploads/4374360/normal_60208a9e8f1e8.pdf
    • https://doleroxewaforud.weebly.com/uploads/1/3/4/3/134322791/jodidazoneraruwom.pdf
    • http://mishgen.com/596215881731hxag.pdf
    • http://vereffka.xyz/science_a_closer_look_macmillan_mcgraw_hill_grade_3d340z.pdf
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/9715690.pdf
    • https://nekazexupogufeg.weebly.com/uploads/1/3/1/4/131454238/mekuwotunavurom.pdf
    • https://janepowowufevi.weebly.com/uploads/1/3/4/5/134506071/8796c556.pdf
    • https://masevaru.weebly.com/uploads/1/3/5/3/135346062/nugepenosa-tajuwaw-vudutazavufovo-xeluvadixuva.pdf
    • http://instasavephoto.com/backpack_literature_5th_edition_freeczssp.pdf
    • http://tumexade.22web.org/behringer_x32_guide.pdf
    • https://lufegema.weebly.com/uploads/1/3/4/1/134132410/subifopanesara.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/277f94bc-fe21-466f-9a75-ffce8ff519d2/what_is_the_half_life_of_potassium_argon.pdf
    • https://uploads.strikinglycdn.com/files/46cb9a17-9c29-4764-99f5-ca35bae40abb/monster_island_godzilla_toys.pdf
    • http://valebuwevunav.epizy.com/addition_worksheets_no_regrouping_3_digit.pdf
    • https://uploads.strikinglycdn.com/files/423f2621-6b49-45cb-a903-272a45ddbb3a/38968711712.pdf
    • http://nigabosepa.epizy.com/negotiable_instruments_act_1981_in_hindi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c63.bin
9648e8eef40785345769f3f690c3f434f6638ebdfde9c229ba5e1e1d9cd1bcb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C63 5464 bytes
font_01_sfnt_off00013ee4.bin
f420eb665c4c01714d1474db0023b55a3bf589bea5dc00df370febc552ed5230
pdf-font-stream PDF embedded font (sfnt) at offset 0x13EE4 10896 bytes
font_02_sfnt_off0001642f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x1642F 4324 bytes