Malicious PDF — malware analysis report

Static analysis result for SHA-256 9daf776c1e551b3a…

MALICIOUS

PDF

80.6 KB Created: 2021-03-25 14:59:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b04add805c6065cb0d85bcae77533a00 SHA-1: 84c43f2447476e3e7f90c66982ba07b220cc6588 SHA-256: 9daf776c1e551b3a3df96678bce54a2ac67845935da08337081b14e67c0007d3
186 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 0.9993

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://ponafet.ru/strik?utm_term=the+dragon+prince+season+3+episode+1+watch+online+free PDF link annotation
    • https://cdn.sqhk.co/pujixefan/34zlHjd/touchgrind_bmx_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/y8ji9NA/47527010141.pdfIn PDF document text
    • https://cdn.sqhk.co/juwafajem/hje9Tie/47735228285.pdfIn PDF document text
    • http://xarapover.mygamesonline.org/midland_75-822_handheld_cb_radio_range.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452374/normal_602ca5b6bd6e6.pdfIn PDF document text
    • https://cdn.sqhk.co/gefokinoxi/PLhhjlF/nonisuganola.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimoxifagi/iUIiiXg/voucher-_v_pulsa_paket_data_bayar_apapuni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503787/normal_5ff3e8ef617fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490128/normal_5fe5ee2d662ea.pdfIn PDF document text
    • http://pebifakonek.sportsontheweb.net/54661221433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461485/normal_601e998ddaaa3.pdfIn PDF document text
    • http://jejederepox.medianewsonline.com/museromijotezidiwotizef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_6033687831ed8.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/rZjjxgd/lpsq_linkin_park_song_quiz.pdfIn PDF document text
    • https://cdn.sqhk.co/gijosevozu/eTPhaih/crossword_puzzle_free_printable.pdfIn PDF document text
    • http://rosipale.scienceontheweb.net/pozusimobigenabuwav.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunadegu/jgjiz0r/blockchain_technology_explained_wiki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_2e0ec6f9077d4a429c8bd4ad86917915.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e22b4ad-973d-439d-9d2c-9eef5f0fc520/bezinugoke.pdfIn PDF document text
    • https://4694dce0-4d1e-4c77-b4da-d1f025f82355.filesusr.com/ugd/fb332b_944ae5e821d149f99de74a269fc66418.pdf?index=trueIn PDF document text
    • http://wonanikapudidak.atwebpages.com/diablosport_intune_i1000_vehicle_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/911c49bb-167c-45f3-8fb1-7cc360cd94b8/mawadomegomamanufed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d0e9dba-e6f6-4d3a-90a9-7584b2274846/oreck_xl_vacuum.pdfIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_9df60d6353794483aa44eae11ced30f3.pdf?index=trueIn 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_off0000fa17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA17 5672 bytes
SHA-256: 5de0d34eca0daf4bd1518fca5fb50249534bb240a4a02be74d563e56c2e0919c
font_01_sfnt_off00010d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D76 11484 bytes
SHA-256: e2ac22c0a3c24cfb047d0b33c0e4e120528abd3e22f13cbfd11d9a56f63a9f06