Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc36582023536c75…

MALICIOUS

PDF

107.4 KB Created: 2021-03-29 11:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9ea6c774878f1cf0cf94cc2fad390eac SHA-1: ee3b36aaef889ce57212e96c42dd2b05db4637e0 SHA-256: fc36582023536c75eb0d31af5d03b4c63ee670530f5cbe90366b8ca8f56913e9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to suspicious domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document's primary purpose is to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://lozipotod.ru/award?keyword=el+deslinde+alfonso+reyes+pdf PDF link annotation
    • https://kujoposa.weebly.com/uploads/1/3/1/4/131453526/2126385.pdfIn PDF document text
    • http://copyright-security-ig.com/tilefotojukpwzx4.pdfIn PDF document text
    • http://bewelaxoludiw.22web.org/which_penny_stocks_to_buy_now_in_india.pdfIn PDF document text
    • https://waneratamif.weebly.com/uploads/1/3/1/4/131436972/dekenumenifebul.pdfIn PDF document text
    • http://ukrdomonis.xyz/parrot_ck3100_installation_audi_a41vc4j.pdfIn PDF document text
    • https://zabagogaj.weebly.com/uploads/1/3/5/3/135313674/4439684.pdfIn PDF document text
    • https://fapixuguxoga.weebly.com/uploads/1/3/1/0/131070829/nigavuf.pdfIn PDF document text
    • https://lobizuwoxigamog.weebly.com/uploads/1/3/4/5/134515373/gewajibabumojiluzo.pdfIn PDF document text
    • http://raisinshub.club/simple_calculator_free_for_windows_8u1ktc.pdfIn PDF document text
    • http://republvinb.fun/is_giving_riba_haramls4jf.pdfIn PDF document text
    • http://shopyou.online/t_mobile_4g_mobile_hotspot_zte_mf64_unlockeljmj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pusori/printable_calligraphy_practice_sheets_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/fajezezorepujujepe.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/kumeremurozoxabuta.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/89072085581.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/golden_song_id.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/wedosados.pdfIn PDF document text
    • http://tavixemurivadol.rf.gd/band_gap_of_semiconductor.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/chatal_band_dj_song_download_mp3_pagalworld.pdfIn PDF document text
    • http://bidokezasi.epizy.com/lijukepezafo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000158e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158E8 4800 bytes
SHA-256: a40c08d45ea61c31a5cb3d8d7eb060c1e1482118bdec7c279adb69585212c7e0
font_01_sfnt_off00016943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16943 12528 bytes
SHA-256: 64d082a6a9e83e574e7135399e1f2c5a0c1443ae80e26c20054a1e155b82b4c8
font_02_sfnt_off0001908a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1908A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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