Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e299f3bbbfb1c35…

MALICIOUS

PDF

74.6 KB Created: 2020-12-20 01:17:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 433f7955b55a79b885176c216495966e SHA-1: 68d769e124db1c2c0674f547b75c7ef48ef29745 SHA-256: 1e299f3bbbfb1c35abd03911a832c677d09a3fe8085c81f57e575f1fb5ced505
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of the 'utm_term=jolie+plastic+surgery' parameter in one URL indicates an attempt to track user engagement with a lure related to cosmetic surgery. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://trafftec.ru/strik?utm_term=jolie+plastic+surgery PDF link annotation
    • https://dituxawijobuf.weebly.com/uploads/1/3/0/9/130969532/dinibe.pdfIn PDF document text
    • https://palozemoxapido.weebly.com/uploads/1/3/4/3/134366311/dd62c1b907.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/3925bbac683458.pdfIn PDF document text
    • https://wemibevufiwoseb.weebly.com/uploads/1/3/0/8/130813314/b199df.pdfIn PDF document text
    • https://zovafizi.weebly.com/uploads/1/3/0/8/130874114/gidov.pdfIn PDF document text
    • https://fesinukovib.weebly.com/uploads/1/3/4/7/134715349/dobaxoxaw.pdfIn PDF document text
    • https://wekegakusujesal.weebly.com/uploads/1/3/4/2/134266445/fowepopijesuke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9a9ae347-4998-41a7-aaf2-27517102e049/cursive_letters_printable_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/laxanufimogaxoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93ef6e61-9a59-4e1f-a76e-ceefd25aafa6/undermount_sink_bracket_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91138d11-4a6e-48ba-b612-a2f9fcbf5b58/kokigepako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7a365c5-1bbd-499f-968e-1a865a5d6c89/jaxiz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC10 4968 bytes
SHA-256: eb8c6923a5c1bdaf1150d53aaa366eb04919bf63646fd8b7a6be5f5d1be79124
font_01_sfnt_off0000ed16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED16 10200 bytes
SHA-256: f04f51281756b13d563bdc702f7c9afe57ba33587ceb7776406c1744ef5bfa76
font_02_sfnt_off00010ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF4 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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