Malicious PDF — malware analysis report

Static analysis result for SHA-256 a182d39ac6340b98…

MALICIOUS

PDF

75.8 KB Created: 2021-03-20 08:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d0a1db2666ae4c47403f002e0f07730f SHA-1: ceb78e481c1b846ffc5274d2e4756da3133cd0d5 SHA-256: a182d39ac6340b98909a91246c063eca262f13491b9ac49b0506131968afbb90
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though partially corrupted, suggests a lure related to an 'Advanced SQL tutorial PDF'. The presence of numerous external URLs, many hosted on disposable domains, points towards a phishing or malware distribution campaign. The primary malicious URL identified is https://fokemale.ru/strik.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://fokemale.ru/strik?utm_term=advanced+sql+tutorial+pdf PDF link annotation
    • https://tojabefe.weebly.com/uploads/1/3/2/3/132303019/9f4aa221cdccb.pdfIn PDF document text
    • https://kiwepuzimogavuf.weebly.com/uploads/1/3/0/7/130776877/lutejemapinetavuj.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/samsung_ln32b360c5d_price.pdfIn PDF document text
    • http://tideparipawovu.mygamesonline.org/83697229738.pdfIn PDF document text
    • http://temivenoni.iblogger.org/67638194980.pdfIn PDF document text
    • http://osthondroz.com/followtok_free_fans_and_followers_for_tik_tokn9mmj.pdfIn PDF document text
    • http://urologo.store/dashboard_excel_spreadsheet6wh3v.pdfIn PDF document text
    • http://punevufazeji.iblogger.org/free_chrome_apk_packager.pdfIn PDF document text
    • https://pukexomupuko.weebly.com/uploads/1/3/1/1/131164185/9341121.pdfIn PDF document text
    • http://servisvds.ru/samsung_ml-2165w_software_download_mac33uoy.pdfIn PDF document text
    • https://modizotu.weebly.com/uploads/1/3/2/7/132740501/86122.pdfIn PDF document text
    • https://kololeranazi.weebly.com/uploads/1/3/4/5/134583506/93c444bb29ec.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/nomerarepo.pdfIn PDF document text
    • https://vovowiki.weebly.com/uploads/1/3/2/3/132303124/0c75a856e8.pdfIn PDF document text
    • http://pojegan.22web.org/mathematics_tricks.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://putagasixebe.epizy.com/flasher_meme_template.pdfIn PDF document text
    • http://daxeletibumu.rf.gd/deloitte_corporate_finance_internship_2020.pdfIn PDF document text
    • http://fekerudosepu.rf.gd/87172214739.pdfIn PDF document text
    • http://filosoko.onlinewebshop.net/22101115571.pdfIn PDF document text
    • http://dolinoko.atwebpages.com/jeffrey_gitomer_libros.pdfIn PDF document text
    • http://mufogedone.epizy.com/bepofajifolodumu.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAF 5204 bytes
SHA-256: 88d74a335ad378270ff64c2bd429ff5dba42e62878c212b808bd425b03ea132b
font_01_sfnt_off0000f072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF072 10372 bytes
SHA-256: 6adb41d8ece0768025e4b83a6d0458aaf4dcd7e4469ade3e63bce410624c1951
font_02_sfnt_off000113c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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