Malicious PDF — malware analysis report

Static analysis result for SHA-256 d057d6decc18b312…

MALICIOUS

PDF

82.7 KB Created: 2021-02-05 08:28:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 46bcee4e79ccb7bebd108ce98d24bcaf SHA-1: 3ed8840ffef4f963c5c49dd3d4c88bf8af1707d8 SHA-256: d057d6decc18b312b26279dff71addde6ee0df11430d1e1b8c368da47b3d4a9a
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, characteristic of a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing unwanted software. Although no scripts were extracted, the PDF structure and numerous external URIs suggest an attempt to redirect users to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=stronghold+crusader+extreme+download+pc PDF link annotation
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/7749622.pdfIn PDF document text
    • https://vazanopika.weebly.com/uploads/1/3/4/8/134896022/zupus.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/7871254.pdfIn PDF document text
    • http://awpmode.com/ximuvemiwisawisuto0tz4r.pdfIn PDF document text
    • https://setopotuvojinow.weebly.com/uploads/1/3/4/8/134877086/dawal-bowepakixanob-buban-xelitinuxu.pdfIn PDF document text
    • https://resawipodejevi.weebly.com/uploads/1/3/0/8/130814711/wivuz.pdfIn PDF document text
    • http://kotexob.iblogger.org/zizezawizo.pdfIn PDF document text
    • https://vuxupiwiruxip.weebly.com/uploads/1/3/0/9/130969000/mixodaxagate-nibibibejevef-lepawul-bupimag.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/muganejuvojof7xfx6.pdfIn PDF document text
    • https://cdn.sqhk.co/fokatekox/hjf9Ieg/talking_bird_of_poetry_crossword_clue.pdfIn PDF document text
    • https://xibuderopugef.weebly.com/uploads/1/3/4/0/134042602/1619603.pdfIn PDF document text
    • https://cdn.sqhk.co/raxasumo/Rjfy6hj/zombie_tsunami_apk_hack.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://rimaxuj.rf.gd/caller_tune_song_wapking.pdfIn PDF document text
    • http://pubexet.rf.gd/dyslipidemia_guideline__2018.pdfIn PDF document text
    • http://jifunujori.rf.gd/28_adventist_beliefs.pdfIn PDF document text
    • http://sevezogare.rf.gd/kilepilamukinoxov.pdfIn PDF document text
    • http://radujexoxetapil.epizy.com/detroit_become_human_pc_igg.pdfIn PDF document text
    • http://kevamateralo.rf.gd/asra_guidelines_neuraxial_anesthesia.pdfIn PDF document text
    • http://gotazuvibidok.epizy.com/edit_text_freeware.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54D 5752 bytes
SHA-256: 348b39c7535c62ba449ceba7a8595bca8caf438b1f00f688cb536a21d4994075
font_01_sfnt_off000108ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CA 6148 bytes
SHA-256: 149738eb3e1d0bfb4a5732e89a115965e6f0cf3fc4971c694d3ce3619176544d
font_02_sfnt_off000118a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A9 10636 bytes
SHA-256: dd8a2325a3f4bd31471c71ed0f17fb3af6d9e7e895d55a2798494d3ea88de3cf

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