Malicious PDF — malware analysis report

Static analysis result for SHA-256 44a6b41b4900a3cc…

MALICIOUS

PDF

66.2 KB Created: 2020-11-19 06:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 01fb35265085314ade22d6e1356d6575 SHA-1: 6c4444484d9619de1077c859b5850149236dc4c4 SHA-256: 44a6b41b4900a3cca32432751fe2ca7e38cea23c25d597e3828cbf7aa865aef6
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://traffnew.ru/strik?utm_term=20+day+preliminary+notice+california+form', suggests a phishing lure related to legal notices. ClamAV detection and ML classification further confirm its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/strik?utm_term=20+day+preliminary+notice+california+form PDF link annotation
    • https://sowofinonapira.weebly.com/uploads/1/3/4/3/134361296/5554905.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417652/normal_5f9a211711e75.pdfIn PDF document text
    • https://rapexinet.weebly.com/uploads/1/3/4/3/134328854/situl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5f8d81b8dd3fb.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/lavosapi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448547/normal_5fb5d1736dd44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0976a4c-3c25-4a6f-b694-f265173af9f7/wexirepokuje.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/xijibibopenekegenazumowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5e0018a-482f-4e15-80fb-300ab113cef7/xegupifidowuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eab105c-f5c1-489b-9628-bbddc684643b/zafiro_la_ultima_viajera_del_tiempo_repelis.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/tewazepitowa.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/nissan_rogue_2018_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e9384f3-740f-4a63-b718-a3acdd55cdb1/kudojosa.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_off0000c49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC49A 5404 bytes
SHA-256: f89192b3f84a6bd4e0e675352f4727a13b2d8c98a448cb47cd1961665ad235f7
font_01_sfnt_off0000d6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F4 10812 bytes
SHA-256: 176edd48e81d4fb14ea2058ec5890887a0fcfdf53e52b67bb56284354221b0ca

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