Malicious PDF — malware analysis report

Static analysis result for SHA-256 944c090f8f1c0364…

MALICIOUS

PDF

86.2 KB Created: 2021-02-22 00:37:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6ed7ba74a4c9ccb0157a2141109e95ea SHA-1: a6a53be37baa1d7d61a9a63de77e8ead8c301fe7 SHA-256: 944c090f8f1c0364228311d6397eb67ac103735261b7e1d43ad426f7187166db
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://jottigo.ru/strik?utm_term=solving+trig+identities+examples PDF link annotation
    • http://thelait.pro/72241347781tjrrl.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/ifEjfij/6203548010.pdfIn PDF document text
    • https://wozuxepu.weebly.com/uploads/1/3/4/4/134478893/8285868.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/igd6QtU/papokekapivitizisarevarig.pdfIn PDF document text
    • https://kilizilefepik.weebly.com/uploads/1/3/0/7/130775254/jofolog.pdfIn PDF document text
    • http://larediwavokib.iblogger.org/free_genogram_template_for_powerpoint.pdfIn PDF document text
    • http://talkme-news.info/voragomusesudugexusocrfe6.pdfIn PDF document text
    • https://cdn.sqhk.co/lokatatape/8gfToX4/island_for_sale_maine_usa.pdfIn PDF document text
    • https://gipulafu.weebly.com/uploads/1/3/4/4/134442702/38fde.pdfIn PDF document text
    • https://patawera.weebly.com/uploads/1/3/4/1/134131312/rububatabesediv.pdfIn PDF document text
    • https://widosutolitidaf.weebly.com/uploads/1/3/4/8/134847614/f868acda177529d.pdfIn PDF document text
    • https://jetosiwer.weebly.com/uploads/1/3/4/7/134767378/c4cc69.pdfIn PDF document text
    • https://puzagejezazi.weebly.com/uploads/1/3/4/4/134465952/vuxozer.pdfIn PDF document text
    • http://goshop32.site/28204351998rlt57.pdfIn PDF document text
    • https://cdn.sqhk.co/fepogosu/iejgjaf/word_games_online_with_friends.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kelawezup.rf.gd/carrier_air_conditioning_user_manual.pdfIn PDF document text
    • http://fedagobugunuxi.rf.gd/98007586170.pdfIn PDF document text
    • http://pazipinabobon.epizy.com/word_meaning_book.pdfIn PDF document text
    • http://tutedenomazul.epizy.com/assessment_report_format_sample.pdfIn PDF document text
    • http://bapiwixobenilax.rf.gd/what_size_screws_for_a_samsung_tv_stand.pdfIn PDF document text
    • http://gigitepusiligo.epizy.com/bury_a_friend_piano_easy_sheet_music.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012a1a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12A1A 19960 bytes
SHA-256: a581c92858bf9254f6b1f9a39400edbf7723bf17d2b9475ca59630ad6f549a4f
font_00_sfnt_off0000f130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF130 5512 bytes
SHA-256: 3adaf83dc76093cdc713da340304afa8331f2171ce45e3d3fc5cb5d6778f1e81
font_01_sfnt_off000103dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DD 11076 bytes
SHA-256: 98460bd4108a885a7ddd78564dd7a63c8e5f83b5db80d53d28e74de1f3e98b1c

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