Malicious PDF — malware analysis report

Static analysis result for SHA-256 97db17f5f390a792…

MALICIOUS

PDF

88.6 KB Created: 2021-04-06 05:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a660eec24936ebcce86b51cedb800f72 SHA-1: 21d4e246a053ce6fde9f15943bceac2bdb73e9a0 SHA-256: 97db17f5f390a792a9944830ecf5d9e047333e2862c20ed8e6ab66b51ccfde90
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier strongly indicated maliciousness, and the presence of external URIs points towards an attempt to lead the user to a compromised or malicious site. No scripts were extracted, but the overall structure and URL distribution are indicative of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 4

  • 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://baarspo.ru/123?utm_term=ecg+report+incomplete+rbbb
    • https://mutuwafidiz.weebly.com/uploads/1/3/6/0/136095616/xejofibosajuso_xonefosesetoziw.pdf
    • https://cdn.sqhk.co/lumozupa/aijagdA/whatsapp_apps_kaise_kare_video.pdf
    • https://tirugisig.weebly.com/uploads/1/3/0/7/130738706/5204bc03.pdf
    • https://static.s123-cdn-static.com/uploads/4369173/normal_5ff6594f55247.pdf
    • https://cdn.sqhk.co/buwuvibija/qw7Njix/bingo_lotto_board_game.pdf
    • https://cdn-cms.f-static.net/uploads/4480414/normal_6018c466146d8.pdf
    • https://cdn-cms.f-static.net/uploads/4379964/normal_5fd83e388c171.pdf
    • http://podekupe.22web.org/11099374579.pdf
    • https://cdn.sqhk.co/tunuviju/ChcpUic/raluranoxegepazin.pdf
    • https://cdn.sqhk.co/gipekoma/hfphgjh/agedi_ledu_ar_rahman_song_ringtone.pdf
    • https://cdn-cms.f-static.net/uploads/4367640/normal_6069b5c59e938.pdf
    • https://static.s123-cdn-static.com/uploads/4403824/normal_5ffa591626c37.pdf
    • http://sidanixom.22web.org/51554129736.pdf
    • https://static.s123-cdn-static.com/uploads/4475375/normal_6000afe289d6a.pdf
    • https://cdn.sqhk.co/wefenilu/hb8jatH/vumetekenususa.pdf
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/pesuke-pezaruwilef-mubadar-jogijerunaxa.pdf
    • https://zaduguwage.weebly.com/uploads/1/3/0/8/130874015/4466299.pdf
    • http://zolekumosex.iblogger.org/devextreme_datagrid_group_template.pdf
    • https://cdn-cms.f-static.net/uploads/4418558/normal_602230816fa44.pdf
    • http://tuderoba.getenjoyment.net/rirulemabir.pdf
    • https://static.s123-cdn-static.com/uploads/4404292/normal_5fec933de4896.pdf
    • https://kamujepepafiga.weebly.com/uploads/1/3/0/7/130775209/cbc668f.pdf
    • https://cdn-cms.f-static.net/uploads/4454280/normal_60503fb0c15f7.pdf
    • https://static.s123-cdn-static.com/uploads/4471095/normal_5ff05e34dd9c6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://diretoroj.rf.gd/53328417193.pdf
    • http://nowimirozox.atwebpages.com/80322999281.pdf
    • http://nojosatu.epizy.com/disguise_a_turkey_printable_template.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001074a.bin
d469dc8f975cf3f93849ff062155d72dcc0a72d905de63c579c04b715b6409de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1074A 4960 bytes
font_01_sfnt_off0001181d.bin
8cd75055a19adc7a13ffb21036917c4b34319c5c320741dbf2866873cc656bd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1181D 11432 bytes
font_02_sfnt_off00013f58.bin
49436f94d5abf10ca6af8af9848174aab82dfe7bc58a5146411d238fd5c76648		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F58 16148 bytes

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