Malicious PDF — malware analysis report

Static analysis result for SHA-256 15244be2ffc506e9…

MALICIOUS

PDF

92.8 KB Created: 2021-04-14 21:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b188dab0efb1e8a434198479f3caab00 SHA-1: 2e6d48e34bdbe35a27ddd5322892e85294ae2198 SHA-256: 15244be2ffc506e9377a1928f65f1cc351daff2a2d231b2a2ae73fd427978a5b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic and the ClamAV detection. One prominent external URI, 'https://resalured.ru/strik?utm_term=lawn+boy+gold+series+primer+bulb+replacement', is likely part of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=lawn+boy+gold+series+primer+bulb+replacement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384461/normal_6015146fb0659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424981/normal_604bbc7aa12e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448733/normal_5fe2bd9dbdd61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401517/normal_6006fe51d7794.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_60245651a902a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389794/normal_5fdbbdddcb850.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://uploads.strikinglycdn.com/files/5b12d70a-4bca-44a1-81b1-5fb4760c4313/48640097439.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/mewire.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/quadrilaterals_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/bringing_them_home_report_key_findings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d46d2d-32e5-4005-a388-9f0882c01b23/in_the_blood_suzan_lori_parks_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/kevusidamozomilefiwoxevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ca180a-0092-4ccb-9f2b-581404f9d582/rufulo.pdfIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_50fe5235a6b84f0bbc11c296457ddac2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/852a7a06-a137-48e6-a03e-80d84e52f3fb/77700564340.pdfIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_5c36e78d2a3843fa9fec1c0d2191799b.pdf?index=trueIn 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_off00011edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDC 5548 bytes
SHA-256: e02e5f51009fa9c6b5db1d6b48fdc148121fdab6c2552440beb1742efc0f58c6
font_01_sfnt_off000131bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BC 11088 bytes
SHA-256: 26f53385e82b6340d308d8a82e7fc3789b9cc170a30edb248a254a96f3780578
font_02_sfnt_off00015778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15778 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.