Malicious PDF — malware analysis report

Static analysis result for SHA-256 2877887d8a01b878…

MALICIOUS

PDF

76.0 KB Created: 2021-02-27 11:38:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c091257930f7d2744b8e300d4e1efb6e SHA-1: 5201eb169432e506d8910dd9aba59fe3cedd64c2 SHA-256: 2877887d8a01b878fd87e6828b34041ed9836e995b92579ae3494eaee0ec0591
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags the use of disposable hosting and link farms, reinforcing the phishing or malware distribution vector. The document body, though heavily corrupted, contains text related to 'Scott county warrant list', likely a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/wix?keyword=scott+county+warrant+list PDF link annotation
    • http://ganitigusawev.mygamesonline.org/as_a_man_thinketh_book_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/ghRjaic/pagopukatimejujaxalito.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/jfheghS/10997884606.pdfIn PDF document text
    • https://sidatugalelukad.weebly.com/uploads/1/3/4/6/134639108/822c495.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/dsSijhr/54955889802.pdfIn PDF document text
    • https://beponelife.weebly.com/uploads/1/3/1/1/131164358/4652772.pdfIn PDF document text
    • http://wamepiguvoj.iblogger.org/40614714796.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/geralds_game_cast_haunting_of_hill_house.pdfIn PDF document text
    • https://xijafidul.weebly.com/uploads/1/3/2/3/132303061/lejuvajoduveset-diveno.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/kakuz_jozakigerefudi_xanakiju.pdfIn PDF document text
    • https://nelunozulugekis.weebly.com/uploads/1/3/0/7/130739970/jimuworuxifoz.pdfIn PDF document text
    • http://rowokalasi.iblogger.org/silamidodesujatel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://niginikixino.epizy.com/49165875297.pdfIn PDF document text
    • http://damugiwixosaxo.epizy.com/sat_practice_test_3_answers_2020.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/agile_software_development_techniques.pdfIn PDF document text
    • http://vajitefafuxuz.epizy.com/karboxylsyra_kemisk_formel.pdfIn PDF document text
    • http://zugumez.rf.gd/91669478619.pdfIn PDF document text
    • http://wegugoleta.onlinewebshop.net/25742032953.pdfIn PDF document text
    • http://luvurukakun.epizy.com/93699496471.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC8 5088 bytes
SHA-256: 5e34381c74647754f718566d1521197b805e324e675012ce40884a394e40a859
font_01_sfnt_off0000ff41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF41 10404 bytes
SHA-256: d86ee91801479af7cd657970075fd7b4db8e25ccccb41a62d4321aec69a0290e

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