Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78ce6317a604db8…

MALICIOUS

PDF

94.5 KB Created: 2021-03-01 01:36:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: aa13f280e76e2607c6c56b1bdb9696d3 SHA-1: cc80bbb543b0778c42acd217da860dd953998572 SHA-256: d78ce6317a604db8aa4e5d93d9260b5b204d8c051d25c09acd5cd863246334d2
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains multiple embedded URLs, with one prominent URL pointing to 'zajinet.ru' and another to a link farm on 'medianewsonline.com', suggesting a lure to a malicious site. The document body, though heavily obfuscated, contains text related to 'intercessory prayer', likely a pretext for the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/strik?utm_term=intercessory+prayer+does+it+work PDF link annotation
    • http://zegererevez.medianewsonline.com/21564537321.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/64844169051.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/nigefudifisin.pdfIn PDF document text
    • http://leninuludobodu.mygamesonline.org/17529602047.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/6287974272.pdfIn PDF document text
    • http://palaxofivuleduj.medianewsonline.com/hp_officejet_7110_a3_problem.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://zitilidi.rf.gd/destination_b1_answer_key_progress_test_2.pdfIn PDF document text
    • http://govujetimavex.epizy.com/88087275841.pdfIn PDF document text
    • http://zorogeloma.epizy.com/mebelamejo.pdfIn PDF document text
    • http://jitawidavez.atwebpages.com/lyrics_sing_1994_remix_carpenters.pdfIn PDF document text
    • http://panexorumilogim.myartsonline.com/78596536117.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/95620601411.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/pojoxonefofanojodez.pdfIn PDF document text
    • http://kurejaj.epizy.com/tulumomirikowobizix.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/banezopagukinidura.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/library_management_system_report.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_off00012691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12691 5016 bytes
SHA-256: ca414db76c84f838163a9cbba6b2d3d59094e0d43291a69527dbbb2e276ec06e
font_01_sfnt_off000137bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137BF 11368 bytes
SHA-256: 9514e70b6748584eb316917ac5b021359c933083348a80654d5b8cf419f407fb
font_02_sfnt_off00015e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E81 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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