Malicious PDF — malware analysis report

Static analysis result for SHA-256 0919c39d6aa3f3f9…

MALICIOUS

PDF

74.9 KB Created: 2021-01-14 12:50:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cce09601e05be88ea7d14dc0a1de55e6 SHA-1: 6553148cb695468061f17a5c4b33e9afa95a4290 SHA-256: 0919c39d6aa3f3f92361faa84814c6c9caa09084d3103f30036cd25810bcf65c
184 Risk Score

Malware Insights

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

This PDF file contains multiple embedded URLs, with a critical heuristic indicating it redirects to known malicious infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though truncated and obfuscated, appears to be a lure related to 'New apps whatsapp 2018', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=new+apps+whatsapp+2018 In PDF document text
    • https://site-1171851.mozfiles.com/files/1171851/59588833827.pdfIn PDF document text
    • https://site-1194115.mozfiles.com/files/1194115/monster_energy_supercross_game_ps4_controls.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487897/normal_5feffc4609d08.pdfIn PDF document text
    • https://jumewabob.weebly.com/uploads/1/3/0/7/130775497/862731.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/l6RBiif/9455149257.pdfIn PDF document text
    • https://site-1173371.mozfiles.com/files/1173371/us_off_road_military_truck_army_transport_driver.pdfIn PDF document text
    • https://cdn.sqhk.co/jagakutojut/hdNibhb/neo_geo_arcade_stick_pro_game_list.pdfIn PDF document text
    • https://wanuwoziburake.weebly.com/uploads/1/3/4/4/134458428/7439150.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382614/normal_5fcd3d87d2299.pdfIn PDF document text
    • https://jilukixewe.weebly.com/uploads/1/3/4/0/134042659/9500677.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/wjanzp7/2234272626.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E0 5360 bytes
SHA-256: e1c6b891d9cb51c3b205a6d455be59d944ad4fda9097e0997be4a4ea4372780f
font_01_sfnt_off0000fb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB36 10496 bytes
SHA-256: 4f4723e4c96e11ef27dd9ce821e37b396c771f6b4d29463539d3b8940b538938

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