Malicious PDF — malware analysis report

Static analysis result for SHA-256 7191d3b99e8147e9…

MALICIOUS

PDF

70.5 KB Created: 2021-01-31 02:06:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 55934d92258f6fafc2339fc9715918d6 SHA-1: 0276d7bc2265278cfff81b8744468e104f05f81d SHA-256: 7191d3b99e8147e9f8f45c1327bd6205adf0595a9eb5291d1b80b2c124114cca
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://maypoin.ru/123?utm_term=red+crucible+firestorm+kongregate PDF link annotation
    • https://cdn.sqhk.co/rubuxupab/giijeT8/forsaken_temple_escape_room.pdfIn PDF document text
    • https://cdn.sqhk.co/befulirawid/ewUqyIL/bricks_ball_crusher_for_pc.pdfIn PDF document text
    • https://suvewuvasalu.weebly.com/uploads/1/3/4/7/134762181/denefoleje.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwutu/eDD4iex/vamupugapewofoverexaje.pdfIn PDF document text
    • https://zulupilasafa.weebly.com/uploads/1/3/1/1/131164294/xufoxoxinoke.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/h1PahfL/ok_golf_cart_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/oPRjdjf/15764615727.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/diczinw/2_player_big_head_soccer_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/pumopivosoba/2DgfvuQ/89500691177.pdfIn PDF document text
    • https://cdn.sqhk.co/jedesawu/csSjdQb/44641305299.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwoxebu/2hbfOqs/simba_run_condos_for_rent.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/lupebesu/numbers_in_english_1_to_1000.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/bedsheet_painting_ka_design.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/what_does_keloid_formation_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/vawubowiluniforiveli.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/nikon_d40_dslr_camera_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/1135478851.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/vtvgo_box_apk.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_off0000d3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B7 5552 bytes
SHA-256: db61af7f86aa882d74a155f66e48210f1f8ac1999d3d34266523e50812a9ec92
font_01_sfnt_off0000e68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68B 11272 bytes
SHA-256: 15026c5b5ba78ec75ca574aebef99df1c91234f72c83f98d2722cc3f0058d977

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