Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa86fdcdc5de9e8…

MALICIOUS

PDF

78.4 KB Created: 2020-12-23 04:31:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 911652bae2367f26ee882bf762229c9b SHA-1: 13f7a046bc84bc7c81bdf1e1c0a4640191c676e0 SHA-256: 2aa86fdcdc5de9e8226dd27679323f01778df740a855a39ee1067232f8e8ec60
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a large number of external links, forming a link farm, with the primary suspicious URL being https://trafffe.ru/strik. This suggests the document is designed to redirect users to potentially harmful sites, likely for phishing or to download further malicious content.

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 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://trafffe.ru/strik?utm_term=world+archery+youth+championships+2021 PDF link annotation
    • https://dobuwejakunarek.weebly.com/uploads/1/3/4/7/134772316/8d2ee6cd0.pdfIn PDF document text
    • https://xelemurefitarag.weebly.com/uploads/1/3/4/6/134601467/bumeguj.pdfIn PDF document text
    • https://wazemuguv.weebly.com/uploads/1/3/4/4/134489137/396151.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/3175599.pdfIn PDF document text
    • https://birivuben.weebly.com/uploads/1/3/4/6/134618962/vunaloxokev_liwasepireb_gupowasetotow.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
    • https://static1.squarespace.com/static/5fc0eb456b97992eb55c2a22/t/5fcc0a4ca87f9f1b19c5950a/1607207502157/58945644656.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/romimesewofazefowese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f6d51f5-618b-4df4-96d0-c659555eb992/chakra_nature_of_boruto.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/eid_dates_2015.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc389708787e879897c9404/t/5fc43a396457125654c22897/1606695482697/97614321209.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/jotun_technical_data_sheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfdc47a13a450babee0d2c/t/5fc2c4961972c46e3cf97f73/1606599831953/the_constitution_of_liberty_the_definitive_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/77101111730.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAB 5636 bytes
SHA-256: 8c10ea98d05f82677b982f1de48bc07308ccf277f53c5fbdf3218aa4a0fb710a
font_01_sfnt_off0000e2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C8 11228 bytes
SHA-256: 219e21cd1b4f6d70bae9417999baf1d0c7647c86cc3b713094f8447d266b598a
font_02_sfnt_off0001088c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088C 16232 bytes
SHA-256: 8c4f20850708d391b115a482448c651f2a982fbdf20ce527d670e7cbafe14b49
font_03_sfnt_off00011d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D93 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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