Malicious PDF — malware analysis report

Static analysis result for SHA-256 a35924025ebf4354…

MALICIOUS

PDF

78.6 KB Created: 2021-03-10 12:24:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 57c4d763e2c3dcde702e9ac1fd6dd20e SHA-1: d678cd6549fde3498eab4bc2790c926132f704ab SHA-256: a35924025ebf4354a0726383763db30e451f40ddad0b4dd05fa0bba4ccde51c5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a malicious intent to redirect users. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/strik?utm_term=army+drill+sergeant+school+fort+jackson PDF link annotation
    • https://narodejezagog.weebly.com/uploads/1/3/3/9/133988416/7426287.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/f9c9e.pdfIn PDF document text
    • http://hytri.com/viwovetana1uc.pdfIn PDF document text
    • http://floradoma.net/miami_airport_food_guidef3ini.pdfIn PDF document text
    • http://emmetrix.net/14376077474ktdlh.pdfIn PDF document text
    • https://guvopizap.weebly.com/uploads/1/3/0/7/130776702/bizojojiteluk-xezogogitamop-lotan-tagagufeko.pdfIn PDF document text
    • https://vagobodowi.weebly.com/uploads/1/3/4/6/134600101/samala-lubagakogixa-nebisex.pdfIn PDF document text
    • https://babivefe.weebly.com/uploads/1/3/5/3/135312435/roxazexubamewesifel.pdfIn PDF document text
    • https://wavopotajulaja.weebly.com/uploads/1/3/4/6/134631105/9947572.pdfIn PDF document text
    • https://xitemexum.weebly.com/uploads/1/3/4/3/134311382/8c34c26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378606/normal_60046ef6c5d9b.pdfIn PDF document text
    • http://uniques.space/persona_5_yusuke_confidant_answers119d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443823/normal_6043f5919bfa3.pdfIn PDF document text
    • https://xegezegev.weebly.com/uploads/1/3/2/6/132683484/d727c480efbf8e.pdfIn PDF document text
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/xujazes-rifab-vivonurerope.pdfIn PDF document text
    • https://rojurunonujimos.weebly.com/uploads/1/3/5/3/135325454/4994018.pdfIn PDF document text
    • http://copyrightreports.com/marevezetaxorusg4pys.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/winumigutam/coping_skills_5_4_3_2_1_grounding_technique_video.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/lumesivufama.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/vegoratorozufu.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/huckleberry_finn_chapter_20_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/intermatic_raintight_outdoor_timer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/bumogobuk.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/103j_capacitor_datasheet.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_off0000f68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68B 5664 bytes
SHA-256: 1d30fb247da6ebb36746838f3a8092d9e3de6103e4d99d239c1f5b008193c0ad
font_01_sfnt_off000109b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B8 10328 bytes
SHA-256: a4747bb669dc0bef9dbdd9eed67cf4c7d65fa7c68a076651beb001600d646d43

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