Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ecb95ebb08f5ef…

MALICIOUS

PDF

54.6 KB Created: 2020-10-31 09:20:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 660f37797fd4089a2547a4bb0b03626c SHA-1: e7d4da258e30d6e6b102ebd29e67956464044d75 SHA-256: 82ecb95ebb08f5ef85f8c86066e948c65a4da9ad5009b0ebc8047bad0fe076e5
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.cc/123?keyword=fate+grand+order+apk+mod+2019 In PDF document text
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/8885788.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7498/5885/files/30098056930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9472/7574/files/fulton_science_academy_ranking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d265e1ae-aefa-46b1-803a-b5bddee3dcc1/26382032417.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/fathers_and_sons_turgenev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6778baec-1394-4cfc-867a-a8125e625612/76027544132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/0767/9923/files/drum_synth_app_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7359/9154/files/family_christmas_outfits_for_pictures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8624/1189/files/download_shrimad_bhagavad_geeta_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4883/6513/files/8_ball_pool_helper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc658f9a-fab0-4dc7-9264-df6a4eeee202/becoming_batman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9207/3895/files/4shard_music_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/gta_vice_city_cheats_codes_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8876f7e-3103-4e7f-bb51-1f6dfebe0063/30221843951.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C8 4928 bytes
SHA-256: ca2d03e082c9f7e522d202d877a8d5b6dbea9e214bde60f6625bf3aa9ec4ed1c
font_01_sfnt_off00007908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7908 5568 bytes
SHA-256: cd379bae36cd5901f8732928948a9754280375f189aa86744aeef1593df07827
font_02_sfnt_off00008bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BEF 15124 bytes
SHA-256: d6e4a51dd98a6b2cb72e35808cc7fd1e00ad7b2b72fb8623757c6cf65dd279a7
font_03_sfnt_off0000b858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB858 16060 bytes
SHA-256: e378496ff4b4329e9698dc62510b77aa20d6148e4879fbbc576c593c8f820d6c

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