Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ac7b654fe44711…

MALICIOUS

PDF

81.0 KB Created: 2021-03-25 22:44:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e387dd21a9fd57235b883d47b2ab4a02 SHA-1: 44628a0d479adbe750693ac54364a4c2af131c37 SHA-256: 60ac7b654fe44711fed07c4dcbde970e8d14dcc7490da2e44a3e5eedf2227828
104 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing a large number of external links, with one prominent URL pointing to a suspicious domain. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of numerous external links and the 'PDF_SEO_LINK_FARM' heuristic suggest an attempt to redirect users to malicious content, likely for malware distribution or phishing. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create SEO-optimized content that can mask malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?utm_term=logo+making+app+free+download
    • http://roboludawu.mywebcommunity.org/lopasib.pdf
    • https://cdn.sqhk.co/vapiwibisa/qiiihgR/98313597319.pdf
    • http://fikosarodone.medianewsonline.com/creative_writing_practice.pdf
    • http://zugapuvu.mywebcommunity.org/xurefevug.pdf
    • http://onlajn-kassa.ru/yugioh_neuron_pcv5mqb.pdf
    • https://cdn.sqhk.co/faxixuwako/giMgqgi/dutimatekinobusomaxotiz.pdf
    • http://pibakulisup.medianewsonline.com/political_sociology_theories.pdf
    • http://zoguponuwuxoli.medianewsonline.com/2491752207.pdf
    • https://cdn.sqhk.co/zupodejadofe/X2iaghb/51832107228.pdf
    • http://secret-empire.ru/the_road_less_traveled_downloadbc0e8.pdf
    • https://cdn.sqhk.co/dagozuwemep/jYghhbz/60515499360.pdf
    • http://cheatyou.site/iowa_storm_outage_mapgsd81.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/07363212-44a2-4524-8d50-7beb891c5bbc/no_logo_lower_receiver.pdf
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_9bfb912d8cc847aeb42ad93377442eee.pdf?index=true
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_3b38581af63d42daa354e7af8971055a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f2d3771e-3347-4a13-9669-f034e588452e/timex_ironman_watch_band_keeper.pdf
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_71fb1a60aac14a1380ac69c48225a02f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/47086eb0-e1de-48ce-acee-a6c646d78a6c/jifawewenexizaf.pdf
    • https://f1fb087f-5d49-4061-aa02-230b108315d3.filesusr.com/ugd/645068_e332a1c39776487da0624f13185eee0a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3edda763-4640-41a9-8734-b0c45e0c547e/weight_exercises_for_chest_and_back.pdf
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_299d381ee5814865829bf9d748f5bf7a.pdf?index=true
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_77239a19fb694c3999029ab1f2f3672d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7eca67ed-e2d5-4cac-a147-8f43a9d80e0a/46491656212.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff55.bin
6d2d9212ede17fcc894a3b6c5067903205ef681fc8e7a79bc1484ff0c807e64a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF55 5280 bytes
font_01_sfnt_off00011152.bin
c28b2df990989aa1846b094aa7ff2b514f2d5781f97d25e363586cc01400fc2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11152 10748 bytes

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