Malicious PDF — malware analysis report

Static analysis result for SHA-256 52b44502f693e826…

MALICIOUS

PDF

80.4 KB Created: 2021-03-03 14:04:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3bd072ac5cb14c86bd6689f9ead8e52 SHA-1: bb573ae63e3d3253294c430529c99a94b0d24646 SHA-256: 52b44502f693e82638d55af9248778c98e7f00e0c78917123669f4c9ebbe0d28
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a suspicious domain related to "free energy change definition", suggesting a phishing or malware lure. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The presence of embedded URLs and a link farm indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/123?utm_term=free+energy+change+definition
    • https://wogefusupe.weebly.com/uploads/1/3/0/7/130740138/tabopozixutinefas.pdf
    • https://cdn.sqhk.co/bevoletef/bicgiY3/32835829082.pdf
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/4315027.pdf
    • https://static.s123-cdn-static.com/uploads/4457281/normal_6008134c3661f.pdf
    • https://cdn.sqhk.co/madufuxenuw/mUegejb/brian_padgett_arrested.pdf
    • https://cdn.sqhk.co/molipigi/jggihlk/21731224995.pdf
    • https://cdn-cms.f-static.net/uploads/4414336/normal_602d4d20d5d90.pdf
    • https://cdn.sqhk.co/xejudawadoni/hgTucgd/zitisaluviniborasinub.pdf
    • https://cdn.sqhk.co/kososojog/dngciig/dragonvale_world_latest_apk.pdf
    • https://cdn.sqhk.co/bujavenizake/axgjjir/word_games_online_for_seniors.pdf
    • http://milanomoda-italy.site/draw_in_a_fightkz5di.pdf
    • https://cdn-cms.f-static.net/uploads/4449600/normal_5fe9dd77a1a29.pdf
    • https://cdn.sqhk.co/zifeduwa/g8igohf/88551146024.pdf
    • https://static.s123-cdn-static.com/uploads/4477400/normal_5feb0751eb831.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vuliwisuwig/one_less_bell_to_answer_fifth_dimension.pdf
    • https://s3.amazonaws.com/luxaduzimase/keynote_speech_powerpoint_template.pdf
    • https://s3.amazonaws.com/patotale/netflix_windows_7_apk.pdf
    • https://s3.amazonaws.com/vigevot/google_sheets_merge_cells_shortcut.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_off0000ff1b.bin
d5424b08e2f96a3cc4fdbf6479a7138c7dacf5795c7587deca094872b466c920
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1B 5132 bytes
font_01_sfnt_off0001109e.bin
7cd67476c299a63d7239789ff4367fe125e4fe8c9c3cbb4ac120802f313ef732
pdf-font-stream PDF embedded font (sfnt) at offset 0x1109E 10536 bytes