Malicious PDF — malware analysis report

Static analysis result for SHA-256 44bf8e66f55356ab…

MALICIOUS

PDF

74.8 KB Created: 2021-05-24 04:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 261f2873ae66df64099aada0bc913e0c SHA-1: 755cfc956cbcf8b4c9b0c828ff2db16dad4754e5 SHA-256: 44bf8e66f55356ab3a9044ab0352eba3c071320e91ee71153c7c615dd4bef135
196 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are part of an SEO link farm designed to redirect users to potentially malicious sites. The primary lure appears to be related to 'minecraft windows 10 account 2020', suggesting a phishing or scam attempt. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/strik?utm_term=minecraft+windows+10+account+2020 PDF link annotation
    • https://tuxewuwa.weebly.com/uploads/1/3/4/7/134776055/felodipifoso.pdfIn PDF document text
    • https://liwifaxuje.weebly.com/uploads/1/3/0/8/130874244/mizogalanakoposezava.pdfIn PDF document text
    • https://xonokuraku.weebly.com/uploads/1/3/3/9/133988937/4e9df1cddf0323c.pdfIn PDF document text
    • https://virubavu.weebly.com/uploads/1/3/4/7/134755547/654ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490256/normal_60336063dba65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489583/normal_603e563c4df3e.pdfIn PDF document text
    • https://gilaxaled.weebly.com/uploads/1/3/1/4/131438091/nekikigedasapisa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485821/normal_5fcd728336267.pdfIn PDF document text
    • https://tivagirususu.weebly.com/uploads/1/3/5/3/135350390/jezabezusoxifeto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382643/normal_5ff68c364a29f.pdfIn PDF document text
    • https://fagugirawax.weebly.com/uploads/1/3/4/3/134388021/3f2075afdba2b2.pdfIn PDF document text
    • https://davovexo.weebly.com/uploads/1/3/4/3/134355956/129208.pdfIn PDF document text
    • https://divoguwobumiwes.weebly.com/uploads/1/3/4/4/134487338/77745f46656a8.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/jeworurowam/dead_or_alive_5_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/wamarumixedutamot.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/13829986269.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/safakapezuwarafaxeg.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/coleman_mach_rv_air_conditioner_cleaning.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/shrek_1_soundtrack_hallelujah.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/adobe_premiere_pro_cc_2021_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/joana_s_horde_leveling_guide_addon.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/twitter_for_laptop_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/pediatric_chronic_sinusitis_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/pufaxajevav.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/77687606427.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_off0000e4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4ED 5408 bytes
SHA-256: b1285a1f322f50a1f72d7b402c6f25332482e31fd1b1be5981ff221f8a728747
font_01_sfnt_off0000f783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF783 11160 bytes
SHA-256: 397a85dfc2a9804eec61ca3492734a7dc3dec64702030f843a4c85e164342851