Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9323861c975926…

MALICIOUS

PDF

72.7 KB Created: 2021-02-08 03:24:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2df19cabf804f910d34f7afc5799dedc SHA-1: 0891cb2c53d9ffbcea96f88eb88fc43280cf8808 SHA-256: 0f9323861c9759269a60aa0d0a23196d3cd992f74280b3cadb62e0f4bd6b859e
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'nd calculator iphone', suggesting a phishing or scam attempt.

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
  • 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 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.
  • 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://yafferge.ru/123?utm_term=nd+calculator+iphone In PDF document text
    • https://dofafurubes.weebly.com/uploads/1/3/4/7/134762343/biwifizi_sufegopagoz_rubinen_vuredawa.pdfIn PDF document text
    • http://stepka2016.xyz/sisters_tv_show_itv_2020golw1.pdfIn PDF document text
    • https://tuzutetenufiro.weebly.com/uploads/1/3/4/7/134716615/guwivonupekos_womazezotum_weloso_fizopekofij.pdfIn PDF document text
    • https://cdn.sqhk.co/nixibaraje/6gfidjf/pixel_racer_hack_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/dediwifime/n6bhcyA/dirac_live_digital_room_correction.pdfIn PDF document text
    • https://cdn.sqhk.co/semegopo/ePggtAH/twdg_character_quiz.pdfIn PDF document text
    • https://cdn.sqhk.co/lukulugere/5igieji/naxirenuvimaga.pdfIn PDF document text
    • https://dilozerekake.weebly.com/uploads/1/3/1/4/131452754/4180790.pdfIn PDF document text
    • https://wuzezabor.weebly.com/uploads/1/3/1/4/131438899/2ff7008243fcf.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/lorifumofelu/mole_worksheet_2_moles_to_particles_answers.pdfIn PDF document text
    • http://nowivopikuzud.epizy.com/calendar_2020_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/91153754431.pdfIn PDF document text
    • http://bawilifugoxak.epizy.com/graph_paper_grid_template.pdfIn PDF document text
    • http://xevorerokune.epizy.com/xeroju.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/9006955238.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C5 4952 bytes
SHA-256: 2582d34153132b629aae3022aa33fde3291de6d3931dde0ae83bbfdf9ab41856
font_01_sfnt_off0000e790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE790 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_02_sfnt_off0000f020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF020 11180 bytes
SHA-256: 126fb1461f7f90f35c629a380d2a1204086976293eb62258c45f001982ae7541

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