Malicious PDF — malware analysis report

Static analysis result for SHA-256 122d2e03263319e1…

MALICIOUS

PDF

86.1 KB Created: 2021-03-11 12:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 96142d4deb9b6e455e48a55225a4dca6 SHA-1: 84cd81e8d5b008c677f3f9322df50850b89a35bc SHA-256: 122d2e03263319e17148f13b92a84d067986bdf6ed19e7fbddd04d019deacf6f
186 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm used for SEO manipulation to attract unsuspecting users. The embedded document body, though heavily obfuscated, contains keywords related to the document's apparent purpose, which is to redirect users to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mezovuduw.ru/award?keyword=habanera+carmen+string+quartet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409607/normal_6034d07f2abca.pdfIn PDF document text
    • https://natesikapepik.weebly.com/uploads/1/3/4/7/134750077/423fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468553/normal_602f4785ba4d0.pdfIn PDF document text
    • https://rafopotoze.weebly.com/uploads/1/3/4/6/134609035/sodopit_zuwuwefu_jevigusutana.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/lujox.pdfIn PDF document text
    • https://mirebaxowani.weebly.com/uploads/1/3/4/0/134017623/bakuxiboxefilesinu.pdfIn PDF document text
    • https://malosopiwa.weebly.com/uploads/1/3/2/6/132695478/digetefor-lonalikuj.pdfIn PDF document text
    • https://sekugiwa.weebly.com/uploads/1/3/0/7/130739582/nudane_bataxakipozi_fikufep.pdfIn PDF document text
    • http://vomamafawib.scienceontheweb.net/what_does_444_mean_in_quran.pdfIn PDF document text
    • http://xuroriwonufuz.scienceontheweb.net/bosij.pdfIn PDF document text
    • https://vewekazetuxif.weebly.com/uploads/1/3/1/3/131379326/fudolivazixuril-sojanatupeziruv-tafiritodet-sizirozubavupuf.pdfIn PDF document text
    • https://pomisefinare.weebly.com/uploads/1/3/4/9/134902228/7b6a4e0d.pdfIn PDF document text
    • https://budigalaxob.weebly.com/uploads/1/3/5/3/135313384/f2dd3e135343166.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/gadupotenavezo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502698/normal_5fecc4119d4fc.pdfIn PDF document text
    • http://vaxiliwu.medianewsonline.com/73523236757.pdfIn PDF document text
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/nasutuxi-varal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426556/normal_5fd2e33f7b36c.pdfIn PDF document text
    • http://zumufufup.sportsontheweb.net/how_much_cost_to_check_dna.pdfIn PDF document text
    • https:///www.youtube.com/watch?vIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_78ace68894b04c0b9598c08cfd917c08.pdf?index=trueIn PDF document text
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_a93120fc94b040468a6cc4505d8e54ab.pdf?index=trueIn PDF document text
    • http://wozimape.onlinewebshop.net/61965033738.pdfIn PDF document text
    • http://telusomabufa.onlinewebshop.net/polaris_trail_boss_250_engine_swap.pdfIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_b2c85046306340d0bdbbcd9c790e5299.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF050 5668 bytes
SHA-256: 4560e9fc7dd9b6c62eed4c84dc826c9b287b0050a21d485b59568f330cd9e2a4
font_01_sfnt_off0001036e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036E 15912 bytes
SHA-256: c3423c675f6aa84078972eb443720bb9909a67877c8de30097548656218b552b
font_02_sfnt_off00013516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13516 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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