Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1633b367abf9afc…

MALICIOUS

PDF

118.6 KB Created: 2021-03-12 19:52:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 227dd40ce0baf7065bdeefc7821fc525 SHA-1: 2bac90ede13564f2257213c5f340209f3485975a SHA-256: f1633b367abf9afc28439455cd37fcb0d549ab9439ac591be36ec7950158d625
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many pointing to disposable domains, which is characteristic of link farm abuse for SEO or to distribute further malware. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded URLs and the heuristic firings strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9568

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.
  • 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
  • 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://fokemale.ru/aws?utm_term=why+did+the+spanish+armada+fail+in+its+attempt+to+invade+england PDF link annotation
    • https://cdn.sqhk.co/kelulegawi/LgdkjaD/perafomadonop.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/ifqPsLS/black_panther_animal_meaning.pdfIn PDF document text
    • http://ziratonis.iblogger.org/326763795.pdfIn PDF document text
    • https://cdn.sqhk.co/konajera/evBiehg/37469992546.pdfIn PDF document text
    • https://cdn.sqhk.co/pupevadojas/C0qibia/kuzuxurorozuxijew.pdfIn PDF document text
    • http://onlyforyou.space/letogumotonujaxihrj62.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/cfXidib/puppy_dog_images_hd_wallpaper.pdfIn PDF document text
    • http://cethq.xyz/2409829580322j2f.pdfIn PDF document text
    • http://yazansoft.com/attu_tamil_movie_2018hb6wt.pdfIn PDF document text
    • http://tiktokfrance.fun/homero_pinto_caputollvz6.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/gcifphd/fan_made_fnaf_games_on_scratch.pdfIn PDF document text
    • https://cdn.sqhk.co/movozuba/iaiicii/dragon_nest_wallpaper_hd_1366x768.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supapimegem.rf.gd/nike_football_socks_size_guide.pdfIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_35ed914af3b940ff8f9b727a0554ca4d.pdf?index=trueIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_272dccf04ac94517a67cc2f13947fb0e.pdf?index=trueIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_fcf0cc7b58834738a6b7e0571fb9b200.pdf?index=trueIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_5e609e74f79d402b9adebfa7d5d2aa6e.pdf?index=trueIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_c7497341da5a44aab8852fe78d1c0b75.pdf?index=trueIn PDF document text
    • http://mowigefugitixa.epizy.com/xawojenakawimomix.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B797 5632 bytes
SHA-256: 16a01311fe8c5b43902bbdacee050da193e2d1d06db28035f9a981dfa63be5df

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