Malicious PDF — malware analysis report

Static analysis result for SHA-256 28c7337629af6c49…

MALICIOUS

PDF

84.5 KB Created: 2021-06-06 03:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b765dc910e3ae95a8f9941d10bbae1dc SHA-1: b070111d7bd880c57537fb60d30f24cc526e7935 SHA-256: 28c7337629af6c4987f8bfb7f20a6ab75cadf786c99ef0bb52be83bdf51b0ad6
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous embedded URLs, with a primary suspicious URL being https://allytemp.ru/pbw?utm_term=who+are+lucifer%2527s+siblings+in+the+bible, suggesting a lure to a malicious site. The PDF structure and embedded links point towards a phishing campaign designed to trick users into visiting a compromised or malicious domain.

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 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.
  • 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://allytemp.ru/pbw?utm_term=who+are+lucifer%2527s+siblings+in+the+bible
    • https://xidiziwuzubiwon.weebly.com/uploads/1/3/4/6/134653180/9eb588e1c.pdf
    • https://mepaxekedin.weebly.com/uploads/1/3/4/5/134514716/dasepisobeko.pdf
    • https://cdn-cms.f-static.net/uploads/4471941/normal_6041c0adf3465.pdf
    • https://cdn-cms.f-static.net/uploads/4455195/normal_601f0b8036ee5.pdf
    • https://regofixaf.weebly.com/uploads/1/3/5/3/135318676/lafure_tejoda_zuvatoguf_nasomid.pdf
    • https://ruxapumuful.weebly.com/uploads/1/3/4/6/134682584/bujadovo-ximezatos.pdf
    • https://rigopijifotifat.weebly.com/uploads/1/3/2/6/132695828/4250223.pdf
    • https://cdn-cms.f-static.net/uploads/4450040/normal_604320a665e5c.pdf
    • https://cdn-cms.f-static.net/uploads/4486975/normal_60b8d3b8adedf.pdf
    • https://gupovokezatiku.weebly.com/uploads/1/3/4/8/134878629/verajekewaxara_gagawinur_ganodopolojol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://rumusapage.pbworks.com/f/sujajokali.pdf
    • http://tusawijer.pbworks.com/f/kedezojusonolewutidazasag.pdf
    • https://uploads.strikinglycdn.com/files/8e88d21f-d684-4632-b436-bec1a33b3fb8/63368310299.pdf
    • https://uploads.strikinglycdn.com/files/ef490d08-7178-41bf-97ef-29ee643b6793/how_to_find_projectile_motion_at_an_angle.pdf
    • http://zalonuzojeru.pbworks.com/f/4248572731.pdf
    • http://nagaxop.pbworks.com/w/file/fetch/144542520/76130522395.pdf
    • http://giresizuloki.pbworks.com/f/what_is_dynamic_photography.pdf
    • http://xojifot.pbworks.com/w/file/fetch/144426552/98756649209.pdf
    • https://uploads.strikinglycdn.com/files/0b83e62e-de3c-45f0-a2bd-e302e716db64/ap_module_5_grade_10_answer_key.pdf
    • http://mifudatu.pbworks.com/w/file/fetch/144689532/suledibuvatezabipukunam.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_off0000f9c0.bin
886a8ba6e34993863ff4de6510b7cc090c355bfad61600fb880b44051e091183
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C0 5212 bytes
font_01_sfnt_off00010b85.bin
c01d1df06aba24af77cc43c4113114b93340f3bf37a63d6443eae0c5d0140ca8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B85 12232 bytes
font_02_sfnt_off00013401.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x13401 4324 bytes