Malicious PDF — malware analysis report

Static analysis result for SHA-256 962ff61ef3eb95b2…

MALICIOUS

PDF

82.7 KB Created: 2021-02-12 11:16:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1ec17123da93d8c0ab976db60a14410 SHA-1: 8279956373aead5e5b4a034ce207202bc5b258e8 SHA-256: 962ff61ef3eb95b2d01bc9cae1fc853116a7155d24af186ff376964fb644c013
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains a mass of external links, including one pointing to 'http://mainsale.pro/boot_camp_drivers_windows_10gfdyp.pdf', indicating a link farm designed to distribute further malicious content. The presence of embedded URLs and the overall structure strongly suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

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://leonvi.ru/wix?keyword=price+of+ginseng+this+year
    • http://mainsale.pro/boot_camp_drivers_windows_10gfdyp.pdf
    • https://cdn.sqhk.co/vamunidibu/Ghc0het/tobukumezaboguxowof.pdf
    • http://kindraretterath.com/937638475539x310.pdf
    • https://badoxilorapa.weebly.com/uploads/1/3/5/3/135347885/bunalibasubupevepuxu.pdf
    • https://ginubeputugexow.weebly.com/uploads/1/3/0/7/130738710/kedovafesif.pdf
    • https://cdn.sqhk.co/ganuniwiku/iBjl3Eb/21633642514.pdf
    • http://zoosalon.org/dolik0tq17.pdf
    • https://cdn.sqhk.co/sabimejuka/0iediaR/bijis.pdf
    • https://static.s123-cdn-static.com/uploads/4386363/normal_5fcff34eecd17.pdf
    • https://cdn.sqhk.co/bivuwusim/cWgc0v7/hot_wheels_drift_king_treasure_hunt.pdf
    • https://cdn.sqhk.co/xidupesijij/if7bhh9/42207403912.pdf
    • https://cdn.sqhk.co/mibajufaneja/idifCCk/nails_and_spa_of_texas_galveston_tx.pdf
    • https://cdn.sqhk.co/wevexifimur/5he2Pzm/classic_ludo_offline_online.pdf
    • http://aslixan.com/el_vampiro_de_la_colonia_roma_descargar1hx2o.pdf
    • http://nesobaka7.xyz/super_cat_shooter_wheels2llvw.pdf
    • https://ketuvukelese.weebly.com/uploads/1/3/4/3/134351906/14ced2cc4cc6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off000105b3.bin
d827da6061c2dd8e1157d7f6905af9f04adbe9df0465154e25ffaff9b4aea286
pdf-font-stream PDF embedded font (sfnt) at offset 0x105B3 5216 bytes
font_01_sfnt_off0001177e.bin
ea0acd33e52f7d00726f65cdbedb1206217b260684bd4b8e430726d343cc2eb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1177E 11164 bytes