Malicious PDF — malware analysis report

Static analysis result for SHA-256 489081f501fe9c86…

MALICIOUS

PDF

65.4 KB Created: 2021-01-11 23:54:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d09d55ef49710173bff58c78740fead1 SHA-1: ca3e2d1e22140fa3b161aaaaaa53720bf47b1bdb SHA-256: 489081f501fe9c8654f03c9bd7048d9fef940383536e6d053dfc26ecdba24d06
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, including a critical alert for linking to known malicious redirector infrastructure. The document contains numerous embedded URLs, many of which are hosted on disposable domains and utilize UTM parameters, suggesting a phishing or scam campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

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
  • 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://cctraff.ru/aws?utm_term=building+adverbs+using+suffixes+exercises+with+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389107/normal_5fd96784514e4.pdfIn PDF document text
    • https://tawurinerumirun.weebly.com/uploads/1/3/4/6/134648739/cc99eeaae7780a4.pdfIn PDF document text
    • https://site-1173433.mozfiles.com/files/1173433/79089048145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427506/normal_5fa997e068e1c.pdfIn PDF document text
    • https://site-1176940.mozfiles.com/files/1176940/las_vegas_challenge_2020_disc_golf.pdfIn PDF document text
    • https://tanofome.weebly.com/uploads/1/3/5/3/135316841/murulu_tovesedawunoba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_5f9a2c7ed7c08.pdfIn PDF document text
    • https://zevofukuje.weebly.com/uploads/1/3/4/5/134585027/fusegaruvukoriva.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/buloxilax-zeriwi-puzadiw.pdfIn PDF document text
    • https://jotovaxawunujej.weebly.com/uploads/1/3/1/8/131856347/vetolad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382958/normal_5fc7fd65276aa.pdfIn PDF document text
    • https://pabovojusu.weebly.com/uploads/1/3/4/3/134339388/tokubiga_nirexo_lomebexenak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379387/normal_5f9d5275bef04.pdfIn PDF document text
    • https://giwaxevo.weebly.com/uploads/1/3/4/6/134644090/0f103d0392e59d1.pdfIn PDF document text
    • https://tiforunu.weebly.com/uploads/1/3/1/4/131437018/remerufa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f87649078c51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426421/normal_5ff57e1ec9fec.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_off0000c272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC272 5692 bytes
SHA-256: be86ea1bf08976669098308b579bac159b1ba68884e7ab0969100c56f279d110
font_01_sfnt_off0000d5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EA 9980 bytes
SHA-256: e4eda4a220bf4ba7f39b1c4b34e278bd965e481e66d18c870c032ad7d3b0029b

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