Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d18f15f50d56a8c…

MALICIOUS

PDF

74.5 KB Created: 2021-06-08 09:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f97a9d42ae83aaf9d473d8007fd83b5 SHA-1: dcca6b0b1a08fc042a777b67bc33d6e345b79cc1 SHA-256: 6d18f15f50d56a8c5643850f56ab761aa79564209c05a7ef592ac8990871b16a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including one to 'allytemp.ru' which is flagged as suspicious. Heuristics indicate a 'PDF_SEO_LINK_FARM' and 'PDF_URI', suggesting an attempt to direct users to external content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and links point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/pbw?utm_term=how+to+file+unemployment+claim+in+ohio
    • https://ravaratu.weebly.com/uploads/1/3/5/4/135401011/10fab03b3aa639.pdf
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/e31d16ffdc04d3.pdf
    • https://sekeratogo.weebly.com/uploads/1/3/4/6/134683690/2272597.pdf
    • https://boliminukedakos.weebly.com/uploads/1/3/4/4/134494229/47c366.pdf
    • https://pudexaxetodeli.weebly.com/uploads/1/3/2/6/132683251/7286022.pdf
    • https://tajagarajoj.weebly.com/uploads/1/3/0/7/130776182/0ecb1.pdf
    • https://pibefabetanob.weebly.com/uploads/1/3/4/3/134376782/detanewef.pdf
    • https://zogadinarele.weebly.com/uploads/1/3/1/4/131409244/a89def6117fbd4b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kolasotosexu.pbworks.com/w/file/fetch/144413811/wisasebafigebokoji.pdf
    • http://tuvovazuvezo.pbworks.com/w/file/fetch/144731580/mera_bhola_hai_bhandari_dj_remix_mp3_ringtone_download.pdf
    • http://lugozamuxika.pbworks.com/w/file/fetch/144412476/12513251710.pdf
    • https://uploads.strikinglycdn.com/files/7aa2014d-897d-4f31-86f6-af40d453560d/what_is_fifo_lifo_and_weighted_average.pdf
    • https://uploads.strikinglycdn.com/files/da310ca9-0f88-422b-b26f-6ea1874d841e/nestor_the_long_eared_christmas_donkey_youtube.pdf
    • https://uploads.strikinglycdn.com/files/4dcc8fa3-d9b2-43da-84c2-28216858e3fa/what_is_uhaul_late_fee.pdf
    • https://uploads.strikinglycdn.com/files/36274173-24ec-41e9-b1a2-5469eea59041/fuponal.pdf
    • https://uploads.strikinglycdn.com/files/d249c6c9-9f01-4c17-8582-f22f67ee390d/psalm_23_4-5.pdf
    • https://uploads.strikinglycdn.com/files/c25fc1f8-be5b-495e-956d-af422bc86f92/nomukifugaguzibun.pdf
    • https://uploads.strikinglycdn.com/files/bb028f56-c0d4-46a6-8936-cd0fa427763c/zakalaxasafovexuwenek.pdf
    • http://fotikeralo.pbworks.com/f/rom_pokemon_fire_red_pt_br_gba.pdf
    • https://uploads.strikinglycdn.com/files/e0736eac-befe-497a-9899-fcc87fe95b8f/commandos_behind_enemy_lines_2_android_gameplay.pdf
    • https://uploads.strikinglycdn.com/files/1148b8ca-aa4c-4bd7-86b2-9c7a9c42df77/dafan.pdf
    • https://uploads.strikinglycdn.com/files/2a55bfd1-86ed-4fab-a7e8-67d22f9f8bd2/55683775185.pdf
    • https://uploads.strikinglycdn.com/files/4330fae7-b1e8-4324-8ac3-a6701a34daee/estill_voice_training_book.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e795.bin
d2349fe349aaedb744666d37d5b4204145cb90d2b412ea5c69593fdc3de0c466		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE795 5136 bytes
font_01_sfnt_off0000f907.bin
57eaa1e1a8937c584dcb4fe8ce2dfbdf5a226d698994229584599b6a85aa07b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF907 10484 bytes

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