Malicious PDF — malware analysis report

Static analysis result for SHA-256 8835772f37d7e8c9…

MALICIOUS

PDF

77.6 KB Created: 2021-03-31 10:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c7012ac8213974dc4ae693c14e83908f SHA-1: 22de6e8c3fa0295f6a3a5d051db3005e8b95b2e2 SHA-256: 8835772f37d7e8c989074fd3985c5e619967ad35bae701729386b0c666bf3bee
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with one prominent URL leading to a site offering a 'cheat' for a game. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for SEO poisoning or phishing. No scripts were extracted, but the structure suggests it's designed to drive traffic to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=how+to+make+a+sim+angry+cheat PDF link annotation
    • https://cdn.sqhk.co/pusuvizodez/DumJ7gj/star_wars_galaxy_of_heroes_game_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lajazufuzu/jc2jjrQ/blessings_of_baapu_video_song.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/Gge5WHp/kusogek.pdfIn PDF document text
    • http://fibisazorowax.mypressonline.com/anyway_you_can_annette_bosworth.pdfIn PDF document text
    • http://zexejodubaxiku.mygamesonline.org/56744352729.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvuzebilet/qhbiefs/90676058247.pdfIn PDF document text
    • http://mofobawosenej.mygamesonline.org/dagesopevisukuzeza.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/egiDigr/78047026273.pdfIn PDF document text
    • https://cdn.sqhk.co/pumurugo/ggQjyji/12392684080.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/nelizenejakarug/38876230600.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/42187418085.pdfIn PDF document text
    • http://jowosos.myartsonline.com/hp_laptop_6470b_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/50385952619.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/95677528383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8930b866-540c-4fc7-a9e7-63d65e1cc246/grammar_in_context_2_6th_edition_free_download.pdfIn PDF document text
    • http://lajovaputap.myartsonline.com/66695580505.pdfIn PDF document text
    • https://78a3f932-2eca-4366-91b9-d52a2f3c5f58.filesusr.com/ugd/a586f9_ad15300d1a0240899f389435ce76cea7.pdf?index=trueIn PDF document text
    • https://f4dd034e-00c7-465c-b850-fb2d75accad5.filesusr.com/ugd/769f78_35633c0576474fada0796340dea20e33.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c403ab43-efef-44a7-a834-04132112a59b/ganaduzonagi.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_off0000f115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF115 5400 bytes
SHA-256: 84854fc6436e82e1cf5ad2f9c9fd9eb495ecb0e6a04edca3efc5c01421806d04
font_01_sfnt_off0001035c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035C 11172 bytes
SHA-256: ee6cdd604841ade5bc9f2af68f7ca0dada9b17ece4f125871c57d8cec027f44c

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