Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c91988a3baa99a…

MALICIOUS

PDF

57.6 KB Created: 2020-10-20 20:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 69e3ec89077ce02e27853da84514db35 SHA-1: f9fcfbdb3f623d3862df12e8aead03cd5196a6d0 SHA-256: 36c91988a3baa99a2d0a1c4fb6399985629a7cf0beaddfa9582597e772d17f40
154 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that point to a known malicious redirector, indicating a phishing or malware distribution attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and the presence of numerous external links suggests a link farm for SEO poisoning or traffic generation. While no scripts were extracted, the document body and heuristics strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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 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.
  • 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://ggtraff.ru/pify?keyword=mla+in+text+citation+guidelines In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5f87daa1103e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f883cb6687b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f873d22ebc2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f8bd02127152.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f86f647a422d.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/dovones_davazulaw_garufivotada.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/sulusilalope-jobede.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/3409757.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/jupafudilorafaveg.pdfIn PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/6993056.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/2845450.pdfIn PDF document text
    • https://welofubevi.weebly.com/uploads/1/3/1/8/131856084/tirezisuzafilix_zebifefor_tasiti_guxotevegomulu.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/35a831c83125da.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuxadol/50090003685.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/32134605111.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/rogunuwiremumusebuxudun.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/25850959774.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/10123270174.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/tobatarazilemofetug.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/baxumojevin.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/lolovaperuzatuvotiruz.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/19351534696.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/linemixazigir.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/4804267693.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/46794332772.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/gotamirepodosarelaxosus.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/mupapona.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/jusavajeluwizogesez.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_off0000a469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA469 5084 bytes
SHA-256: 07a737cc5e5c41791a64939912525ec5dbf142aa1106fab7ed931b078c3de3f1
font_01_sfnt_off0000b5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C5 10240 bytes
SHA-256: a1d958e791d826466a0c7df970d22c76f4393824f99c69b53ae796a001d38284

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