Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1f4ad035056a8e…

MALICIOUS

PDF

86.4 KB Created: 2021-02-14 15:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3c940eb8687d0625d7e0818de0625047 SHA-1: 9de39a20e606a5f7d4f447daeb87b7dea78239c2 SHA-256: 1d1f4ad035056a8eda67f132cb64cd23d65230f0f4000f1b18d591c3d3511ca8
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. Additionally, a machine learning classifier and ClamAV both flagged the file as malicious, specifically identifying it as a phishing trojan. The embedded URL 'https://crophysi.ru/wix?keyword=chief+legislator+powers' is the primary indicator of malicious intent, likely serving as a lure to a phishing page or a malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/wix?keyword=chief+legislator+powers In PDF document text
    • https://static.s123-cdn-static.com/uploads/4460463/normal_5ff5341ee1670.pdfIn PDF document text
    • https://cdn.sqhk.co/busosuwik/OMzKiij/oscar_isaac_dune_beard.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369149/normal_5fc6fb655021d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482219/normal_5ff6bd937f25a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460266/normal_5fcf9acacd126.pdfIn PDF document text
    • https://cdn.sqhk.co/wirujurumugi/gdvkifD/opiniones_excursiones_para_cruceros_shore2shore.pdfIn PDF document text
    • https://jaxedafotonomut.weebly.com/uploads/1/3/4/8/134885779/153757f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389354/normal_5fdad19a8ab44.pdfIn PDF document text
    • https://kawuwulaf.weebly.com/uploads/1/3/3/9/133987507/3444524.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425484/normal_5fe09f0cd3449.pdfIn PDF document text
    • http://newyearshop.site/37513933173hjkmf.pdfIn PDF document text
    • https://turezizudowan.weebly.com/uploads/1/3/1/6/131606253/7870668.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475563/normal_5fec84351f520.pdfIn PDF document text
    • https://cdn.sqhk.co/pagifizipafo/jhjaieE/fireman_s_park_pavilion_lindenhurst.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421613/normal_5fde94765fff9.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://s3.amazonaws.com/tuzamada/canadian_visa_application_form_uci.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_off00010ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE2 4960 bytes
SHA-256: 7f2c6fe352d185659959774e3a72d24e435bf9e6ed999b7e9da67681fbceae62
font_01_sfnt_off00011bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF4 10032 bytes
SHA-256: 51f379d9c9baab64e1ed134527a30cf646b99a03899b52de37222f814ee51b70
font_02_sfnt_off00013e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E4D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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