Malicious PDF — malware analysis report

Static analysis result for SHA-256 126f41142b64f54d…

MALICIOUS

PDF

73.0 KB Created: 2021-03-04 05:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 134f9380ef11174fd98265786808a867 SHA-1: 87e1cd22905cd4c0a83a25697f24879a43705501 SHA-256: 126f41142b64f54d3301a22f0f2f887fa440d9010b1a76092486ea719d369c37
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://kuzutuzo.ru/wix?keyword=playstation+apk+for+android PDF link annotation
    • http://world-wildshop.com/kalina_girls_frontline1tx8b.pdfIn PDF document text
    • https://takibuvekinapix.weebly.com/uploads/1/3/4/4/134456834/dimojegafanijagat.pdfIn PDF document text
    • http://skidki-day.shop/2006_dodge_charger_rt_repair_manual95ow8.pdfIn PDF document text
    • https://solujasamaro.weebly.com/uploads/1/3/4/6/134695729/9e6182d43780.pdfIn PDF document text
    • https://madugonado.weebly.com/uploads/1/3/2/8/132815119/5799582.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/rojbzge/92025228319.pdfIn PDF document text
    • http://love-cosmetics.shop/la_siesta_del_martes_english_summaryywpsr.pdfIn PDF document text
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/2776889.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/TEuqhTc/knife_throwing_techniques_youtube.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/woxewiwupir/fudasatud.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/area_of_polygons_and_circles_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/elder_scrolls_oblivion_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/chunga_ma_tujhe_hardam_song.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/46274264119.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_off0000dd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD22 5200 bytes
SHA-256: 026d551bea88d340a20f986864c4bc7ce21d650f44f409f14463515cab8d9613
font_01_sfnt_off0000eef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF1 12524 bytes
SHA-256: ac6030100ad795e013f0ec70b42a1d34608a16dea05dafa25323ee10e0f1042a