Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7f896f8a99a2d57…

MALICIOUS

PDF

89.1 KB Created: 2021-02-11 20:14:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22b9755a0de81d91176c440be6fd56e5 SHA-1: b9b142c625ab329a8724ce63e4a1f5e134e2b5cc SHA-256: b7f896f8a99a2d57555c30c6624b04797531db5509a7deeaf9e4de47bdef5790
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=lincoln+on+leadership+summary
    • http://usesalle.xyz/asiga_pico_2_manualq3qbz.pdf
    • https://jovigazever.weebly.com/uploads/1/3/1/6/131637362/7215157.pdf
    • http://parhelifrl.space/zedomunakujemo9ukis.pdf
    • https://cdn-cms.f-static.net/uploads/4471992/normal_5fd9794be39fd.pdf
    • http://jobware.pro/idle_dice_hacked3bw0u.pdf
    • https://cdn.sqhk.co/xojelumegasi/dnpLjip/dice_tray_and_storage_diy.pdf
    • https://cdn.sqhk.co/xejudawadoni/jajb7Ir/brutal_death_metal_radio_online.pdf
    • https://cdn.sqhk.co/ritafase/jhgihnJ/endless_run_magic_stone_mod_apk_revdl.pdf
    • https://resusogid.weebly.com/uploads/1/3/5/3/135346187/jumifajulufigut.pdf
    • http://magic-spring.com/mountain_sniper_shooting_game_download_apkhny8y.pdf
    • http://fortysgjdk.fun/98830654312d6fmq.pdf
    • http://autobuff.xyz/pixlr_photo_editor_free_download_for_windows_10bp9nr.pdf
    • http://stankoff.org/45306269882dqn3h.pdf
    • http://idealicaitalia-ufficiale.site/mumiledered1uub2.pdf
    • https://cdn.sqhk.co/baluwofuk/ZAgdPA6/75892224606.pdf
    • https://cdn-cms.f-static.net/uploads/4387925/normal_601466801ab27.pdf
    • https://cdn-cms.f-static.net/uploads/4473916/normal_601975ce82098.pdf
    • https://cdn.sqhk.co/sovanoniwuva/hhT8qEA/16264601038.pdf
    • https://static.s123-cdn-static.com/uploads/4371020/normal_5fe224f195d8d.pdf
    • https://mebedepubini.weebly.com/uploads/1/3/0/8/130813558/1996584.pdf
    • https://sejimewopokotas.weebly.com/uploads/1/3/5/3/135350214/tewima-fetifaradef.pdf
    • http://hopecommunitynaz.com/eliciting_sounds_wayne_secordv8j79.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zevutebulaworel/miniclip_8_ball_pool_hack_android.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dcf.bin
a16d78b4e765d5ee2bbe34147faa0d9708ca9f4bd36cf3b090d8d65c0d41a973		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCF 6548 bytes
font_01_sfnt_off00011e26.bin
67faadbf64dc0a62c0f469be8bdb944f8d23e125d32985464d5f93c70cb1cf49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E26 5356 bytes
font_02_sfnt_off0001303d.bin
b4812c0097e05c9980af0702c8e4543cd6b2c1728ec7de4af94d81b79f93dfb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1303D 10768 bytes

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