Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b3fda1bd71ab19…

MALICIOUS

PDF

87.9 KB Created: 2021-03-23 20:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 23c26d08c5108a7fcab554bb852bac99 SHA-1: 801345b7272f8382744fb42e66003854749f38f6 SHA-256: 46b3fda1bd71ab19ed2be1b410e68eadd7b65e3751c0c9074c76d7317eb11752
136 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's a lure for free downloads, specifically referencing 'routing protocols rip ospf bgp pdf'. The primary malicious URL, https://midufefew.ru/award?keyword=routing+protocols+rip+ospf+bgp+pdf, is directly associated with this lure. ClamAV and ML classifiers strongly indicate maliciousness, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/award?keyword=routing+protocols+rip+ospf+bgp+pdf PDF link annotation
    • http://zoxodur.sportsontheweb.net/writing_task_2_academic_download.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/WjdhjSD/monster_trapper_bug_killer.pdfIn PDF document text
    • http://xxlmature.site/915849106136e6d4.pdfIn PDF document text
    • https://gixovazaviv.weebly.com/uploads/1/3/5/9/135982549/vazulu.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/laporan_pendahuluan_stemi_anterior.pdfIn PDF document text
    • http://gtomishebs.xyz/860706178945oj5j.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/download_building_construction_by_barry.pdfIn PDF document text
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/zetepiwese.pdfIn PDF document text
    • http://goodsfor.life/libro_de_fisica_2_de_secundariaguhtx.pdfIn PDF document text
    • http://gemofesane.medianewsonline.com/61193792393.pdfIn PDF document text
    • http://fuckfrsky.com/shbp_enrollment_portal_quick_reference_guider3il7.pdfIn PDF document text
    • http://giftcard-sale.store/introductory_mathematical_analysis_for_business_economics_and_the_life_and_social_sciences_ebookyo9nj.pdfIn PDF document text
    • https://rusofejez.weebly.com/uploads/1/3/1/8/131856127/4812421.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/97286647853.pdfIn PDF document text
    • https://serawododi.weebly.com/uploads/1/3/4/8/134885696/2176126.pdfIn PDF document text
    • https://cdn.sqhk.co/fabetojowuje/g0DEifz/tigusezijebotag.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/zarusegibitumet/gemunad.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/oneplus_3t_review_android_authority.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/68570061078.pdfIn PDF document text
    • http://nofolimuri.myartsonline.com/tatigefidazulenogago.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/68527947239.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_off000101ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EA 5024 bytes
SHA-256: 1584c02f90c95f7c950c317d145bfb0c5174f969233e162b8820eabb34be3597
font_01_sfnt_off00011307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11307 15320 bytes
SHA-256: 5d56488f1f73d8207ec59770d53597e6e5083bd7657f332b63842743dce70e50
font_02_sfnt_off00014292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14292 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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