Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae81f1575dd6fa61…

MALICIOUS

PDF

68.2 KB Created: 2021-02-18 19:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 404b1774cc42432bc7fdfdcda3716ade SHA-1: 0b6f8daa959b6cbf39d42ef5a5ae0937eeafae54 SHA-256: ae81f1575dd6fa61d8e46992b62765ef3d924dd8bc4b985e90e1cdfa6eaa599b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=springboard+mathematics+course+3+answers PDF link annotation
    • http://xruhdfo.site/leraxanamelodiseponugeyjde.pdfIn PDF document text
    • http://nout-prokat.website/nesenixem20t9.pdfIn PDF document text
    • http://natorg.fun/baxuzatekotelozallnui.pdfIn PDF document text
    • http://fumigatoff.online/purchase_justification_letter_templatebv107.pdfIn PDF document text
    • http://nyvelsets.online/bsnl_karnataka_tariff_plansx641x.pdfIn PDF document text
    • https://sowibize.weebly.com/uploads/1/3/5/3/135348762/2304d612ea.pdfIn PDF document text
    • https://cdn.sqhk.co/nemizuxe/fppfL5U/tap_tap_fist_coupon_code.pdfIn PDF document text
    • https://patinijogu.weebly.com/uploads/1/3/4/8/134854147/9160830.pdfIn PDF document text
    • http://korecos.ru/6056733108tl0ma.pdfIn PDF document text
    • https://xaxuxogupovugid.weebly.com/uploads/1/3/0/8/130874119/mukubibibobobukeli.pdfIn PDF document text
    • http://nukicew.xyz/varitimovixabezegovuto23lo.pdfIn PDF document text
    • http://bcipreactivaperu.com/83556547259oz8bw.pdfIn PDF document text
    • http://atomyimperial.ru/ariens_8526_parts_manual3hqwu.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/fixararololu/67338540696.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/beautiful_now_lyrics_video.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/camera_lenses_explained_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/fur_elise_piano_sheet_music_musescore.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/suddenlink_channel_guide_jonesboro_arkansas.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/new_cartoon_love_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/19099078548.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_off0000cdd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD4 5956 bytes
SHA-256: 55f18868b30b949207525f59dc6dab385bbdc5a81af40272887c371da9109461
font_01_sfnt_off0000e1f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F7 9868 bytes
SHA-256: 963407f4f41f1e6c8c1e58a807a0f51ab4c855785987ead0def097e9339156b1