Malicious PDF — malware analysis report

Static analysis result for SHA-256 a537a6e8ba08dcdc…

MALICIOUS

PDF

76.1 KB Created: 2021-04-03 14:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e9556759dfd98b04a0d14cc4a7c3e47d SHA-1: c3895c18824ab4882e491d973f091a13f037a2fc SHA-256: a537a6e8ba08dcdc1868fd92c3f1d935dcda34d386c234f0f666f55a43ea97fd
136 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high-severity rule indicating an image lure linking to an SEO redirector for phishing. The embedded URL `https://botokaw.ru/award?keyword=vegan+food+list+pdf` is the primary indicator of this phishing lure. While no scripts were explicitly extracted, the PDF structure and the nature of the heuristics suggest it's designed to trick users into clicking the link, likely leading to a phishing page or a further malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://botokaw.ru/award?keyword=vegan+food+list+pdf PDF link annotation
    • https://mixozanuzobese.weebly.com/uploads/1/3/5/4/135400893/pusijala.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/aibaVjb/nijunibed.pdfIn PDF document text
    • http://koxodalepep.iblogger.org/15137838779.pdfIn PDF document text
    • http://nibobokil.66ghz.com/5635219976.pdfIn PDF document text
    • http://xukiwuze.22web.org/16280969511.pdfIn PDF document text
    • https://fiwerabonu.weebly.com/uploads/1/3/4/3/134347662/zinufep-dumefejifer-rutipobeb.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/KR4ihTY/9016471708.pdfIn PDF document text
    • https://xugeguva.weebly.com/uploads/1/3/1/4/131438310/nakupuse.pdfIn PDF document text
    • https://cdn.sqhk.co/vigamodijek/jaxieWF/55438566894.pdfIn PDF document text
    • https://cdn.sqhk.co/ximepadogi/aCobagh/limbo_game_download_for_pc.pdfIn PDF document text
    • http://jusibebobekig.iblogger.org/wifiremunumikidizukuzat.pdfIn PDF document text
    • https://domazatavaxagit.weebly.com/uploads/1/3/0/7/130775902/d660d8.pdfIn PDF document text
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/6645459.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/rudelazifizuvo/ark_survival_evolved_xbox_one_taming_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/must_see_series.pdfIn PDF document text
    • http://zijadafofitewop.rf.gd/1511646028.pdfIn PDF document text
    • http://jotuvuresaserex.rf.gd/ryobi_band_saw_blades_for_metal.pdfIn PDF document text
    • http://puxetixunelotaz.epizy.com/how_often_to_feed_daphnia_to_fish.pdfIn PDF document text
    • http://malusamum.rf.gd/what_is_centralization_and_decentralization.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/65156935889.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/transform_specialist_medical_center_dubai.pdfIn PDF document text
    • http://xetobagog.rf.gd/pepegu.pdfIn PDF document text
    • http://fiwipofel.epizy.com/bitmap_width_and_height_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/template_border_for_wedding_card.pdfIn PDF document text
    • http://fazejilijir.epizy.com/woreloseduviwum.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_off0000ec29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC29 5076 bytes
SHA-256: 7a15772c4895c15d282c4853fa381cb8f92bac1f5bb12b915c60821fde1118b3
font_01_sfnt_off0000fd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD93 10736 bytes
SHA-256: 6fab3babe8da9e1605d00748070eb5517330c41d031dc0e8824cb0de1a55a843