Malicious PDF — malware analysis report

Static analysis result for SHA-256 028ff4fb727fb2da…

MALICIOUS

PDF

75.8 KB Created: 2021-02-26 12:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: faa9e66312af861ea26b61b33b4fc27a SHA-1: 9c569ac98cf3bd4088092214b5a84f9ed6d9b884 SHA-256: 028ff4fb727fb2da058518d6c56c2360edd2c95fdcbcf2de21022c23b88b645f
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://gimoguvi.ru/123?utm_term=what+is+the+fuel+ratio+for+husqvarna+chainsaw PDF link annotation
    • https://mokugutareno.weebly.com/uploads/1/3/1/6/131606089/6675540.pdfIn PDF document text
    • http://trudogoliya.online/life_and_books_and_everything_season_2b4u20.pdfIn PDF document text
    • https://kofasarafafe.weebly.com/uploads/1/3/5/3/135390193/3346742.pdfIn PDF document text
    • http://kisikevofe.iblogger.org/89911216684.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/BijPICW/revenger_x_vape_coil.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/hhh77hj/niduvepumixasidelap.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/KjaGgho/battleship_north_carolina_location.pdfIn PDF document text
    • http://jadebey-x.com/apple_event_2020_wallpapersrvsp8.pdfIn PDF document text
    • http://sexesex.site/fufotazusafaxiratepinjm.pdfIn PDF document text
    • http://malarusexomobaf.22web.org/73568549941.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/wiwuxot/avantree_leaf_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/xenomupomofudozugoxafud.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/jejevipopovuru.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/dunixigodemo.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/93031326358.pdfIn PDF document text
    • http://situgew.epizy.com/kuvadudato.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_off0000eb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB43 5260 bytes
SHA-256: 74cb4f1615c47c083b6a00067481f4d29f9bc36276264304061ffa72fa6c840e
font_01_sfnt_off0000fd41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD41 10752 bytes
SHA-256: a05863e7e4fdfa30a20ec46396297755d0c91d9beb0d50f8812fbd9dc4ca4ce8

Open this report in the interactive analyzer, or submit your own file for analysis.