Malicious PDF — malware analysis report

Static analysis result for SHA-256 414a974d314cb598…

MALICIOUS

PDF

68.4 KB Created: 2021-02-03 17:22:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 56d92fed9db7045d076789b4510b8c88 SHA-1: 99c4cd7c6919f9597e4565efd5aedd190b989f50 SHA-256: 414a974d314cb59843bce776acbc922575c715ae9edf66bd21ec50a221472be9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. The presence of 'utm_term' parameters in some URLs further supports a campaign-driven approach.

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 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://leonvi.ru/123?utm_term=adler+orchestration+pdf PDF link annotation
    • https://nekitunanozot.weebly.com/uploads/1/3/5/3/135346928/zavak-gosodozonuwaw.pdfIn PDF document text
    • http://4escam-bot.online/eheim_fish_feeder_manualg3lxm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465259/normal_5fd050db5ded9.pdfIn PDF document text
    • https://kikosezuzo.weebly.com/uploads/1/3/1/3/131378972/71f6f992b3e.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/raxebiwiworisudiju.pdfIn PDF document text
    • https://rerararomimin.weebly.com/uploads/1/3/1/3/131383042/4300393.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/cDgjHXk/pudagosusogu.pdfIn PDF document text
    • https://kezagoguz.weebly.com/uploads/1/3/4/1/134131769/8136858.pdfIn PDF document text
    • https://fugakesuj.weebly.com/uploads/1/3/0/7/130776648/8982063.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393181/normal_5ff50dc56cc70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414489/normal_6015aea516783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486565/normal_5fe8fd1c1a3b6.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/sifawekujiki/13871589996.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/android_studio_linux_mint.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/dictator_movie_aladeen_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/yolo_anonymous_questions_app_android.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF30 5232 bytes
SHA-256: 7e98b69655e3138dbf7a759dcfa03b5c67b0656a5dcf2abe9d6f375a689b23b3
font_01_sfnt_off0000e0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F8 10396 bytes
SHA-256: 05079e5987cd2c3f21fba29b30cfcf0f5fde07619abf98af5ebe5765d5cb34ea

Open this report in the interactive analyzer, or submit your own file for analysis.