Malicious PDF — malware analysis report

Static analysis result for SHA-256 f344a7070ba41099…

MALICIOUS

PDF

80.5 KB Created: 2021-05-01 00:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8f35b8c950cfea41bdffbde502fa2b32 SHA-1: e3a5dee4bdfdd308e42f30a11474398307526bc6 SHA-256: f344a7070ba410991e85c72ca20349de4850c4669ea70e7e385e998511f6ce90
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The embedded content, though heavily obfuscated, appears to be related to search queries, further supporting a phishing or SEO manipulation motive. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://gimoguvi.ru/strik?utm_term=what+is+the+egyptian+symbol+for+strength PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366015/normal_5fe028af63aa8.pdfIn PDF document text
    • https://tokubarip.weebly.com/uploads/1/3/1/3/131380438/sogupixozakeral.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489717/normal_603f9936ded18.pdfIn PDF document text
    • https://nukowerijusez.weebly.com/uploads/1/3/4/3/134320067/0ee60.pdfIn PDF document text
    • http://setafugeridol.scienceontheweb.net/business_english_speaking_book.pdfIn PDF document text
    • http://pivolirarorip.mypressonline.com/ritam.pdfIn PDF document text
    • http://zolepop.mypressonline.com/sabonagubive.pdfIn PDF document text
    • https://zefipoxiba.weebly.com/uploads/1/3/2/6/132681281/5079245.pdfIn PDF document text
    • https://ninapivojejuru.weebly.com/uploads/1/3/0/7/130775346/2836498.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/asterisknow_tutorial.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366337/normal_5fd0846c5647b.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
    • http://tajavuminona.atwebpages.com/genokil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e347e3b4-f87e-4a5e-8485-12f5a695e9c0/nugad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07601b9d-1209-45b0-a01d-47a7018c1bb5/graphic_novel_books_for_3rd_graders.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7abe7a46-3e4e-4ada-bbdb-0238bf994ca5/20447586712.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/when_a_man_says_if_you_play_your_cards_right.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/51404965954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bd90ce6-43fb-46e3-9bab-51a9240e602b/eliphas_levi_book_of_splendours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ec0b695-dc8f-4476-b75b-cf8901438653/20891816370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbc65107-3c1e-4ffe-b37b-bceda2f07dab/lexobegipozusijixizanoxox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/044e9380-7066-4fd4-bd62-61e6f72fd835/winning_jack_welch_publisher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f05604b-6284-447c-a60c-9f035eb85954/wobuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/50521021641.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/72283704824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/254f72b9-3344-47c6-94de-19c104297cc3/book_of_jasher_free_download.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC4 5356 bytes
SHA-256: d4e1d63c7bd176da5d25a020bb9b21558dd30b01036caab466fccedbfea03735
font_01_sfnt_off000100d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D6 10964 bytes
SHA-256: 0a5643b3c4d807dfc433bde82c63f56135edafd9fe488740c43f57f118b32dda
font_02_sfnt_off0001265c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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