Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f1acd11b05a4df…

MALICIOUS

PDF

82.2 KB Created: 2021-03-29 01:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: db5d36d5e66d620ae8c3abb3ee36f7a0 SHA-1: c90c43c73633acaac432abf4d47efaff21917eed SHA-256: 02f1acd11b05a4df008b9d48deb06c014f1f625e0d788ab90f214070403c7871
136 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's a phishing lure, using an image to redirect users to a URL that promises a free download. The embedded URL `https://jumiwimov.ru/award?keyword=anatomy+mnemonics+book+pdf` is flagged as a high-risk indicator. While no scripts were explicitly extracted, the PDF structure and associated heuristics strongly suggest an attempt to trick users into downloading further malicious content, likely via a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jumiwimov.ru/award?keyword=anatomy+mnemonics+book+pdf PDF link annotation
    • http://nukowivoxom.iblogger.org/bottom_navigation_bar_android_change_color.pdfIn PDF document text
    • http://rofuxipof.mywebcommunity.org/4937593477.pdfIn PDF document text
    • https://cdn.sqhk.co/safovokon/H4UgcxV/rupafuleninobodikosav.pdfIn PDF document text
    • http://badoxik.scienceontheweb.net/canny_edge_detection_matlab_code.pdfIn PDF document text
    • http://wasakamow.22web.org/bluestacks_android_emulator_free.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/pjsqidm/liluresemefifo.pdfIn PDF document text
    • https://cdn.sqhk.co/setuboluraje/ljcvgdG/14599173699.pdfIn PDF document text
    • http://jovasetiveduza.scienceontheweb.net/62702460808.pdfIn PDF document text
    • http://bodegumuxizobi.22web.org/fuvuxapiwoke.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/baposivarabuj/55351538489.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/70752176805.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/mabuzedosowejuxedejejix.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/pavoburozirutajidow.pdfIn PDF document text
    • http://tinasixubu.epizy.com/29708298934.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/95347004949.pdfIn PDF document text
    • http://bajobakokela.epizy.com/muzogaxesajulupukoduwefex.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/56097617896.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/how_much_does_an_army_reserve_chaplain_make.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/zewojutadusilif.pdfIn PDF document text
    • http://jidafamibudajir.epizy.com/hebrew_name_meaning_daughter_of_god.pdfIn PDF document text
    • http://joriboka.epizy.com/anastasia_slash_sheet_music.pdfIn PDF document text
    • http://totaraxidob.rf.gd/woxowewofu.pdfIn PDF document text
    • http://giwupaw.epizy.com/nejojurodaronab.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/coast_guard_blue_jacket_manual.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_off0000f56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56D 3604 bytes
SHA-256: 1cc0d5f395c955b32f8540070d28f3100cf2d33c6ab445edd3faa95ffca5b4a5
font_01_sfnt_off00010257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10257 5468 bytes
SHA-256: 0e7e6b0084d6998961deafe713fbd442216fe5f27eeed15300f33b6007741179
font_02_sfnt_off000114f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F4 11308 bytes
SHA-256: 767123b9a13ffeffbe8c53ab4f0bb54f53afc2b31a59322c0b66c81859dd274e