Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9e006742a7a3998…

MALICIOUS

PDF

76.3 KB Created: 2021-04-01 02:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faf430e4219471e12cd87c8ffdb89aa2 SHA-1: 53732d7878d6264a0727ab0dfc2545b44425d334 SHA-256: a9e006742a7a39983bf5c5b1929f1f85f33484b86a75d04b3476afef0fe0cb44
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicative of a link farm or phishing campaign. The 'SE_DOWNLOAD_BUTTON' heuristic suggests a lure to download or click, and the 'PDF_SEO_LINK_FARM' heuristic confirms the presence of numerous external links. ClamAV detection and ML classification further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious distribution or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=2006+bmw+325i+e90+service+manual
    • https://cdn.sqhk.co/ratufewebu/rgcgfAg/greatest_hits_radio_jingles.pdf
    • https://cdn.sqhk.co/jetirivotu/giSMcCT/autoloader_bb_z3_terbaru.pdf
    • https://cdn.sqhk.co/savunowudob/jdiffhd/vampires_vs_the_bronx_cast_age.pdf
    • https://cdn.sqhk.co/vemetafije/jhaehiH/blue_bottle_fly_trap_diy.pdf
    • https://cdn.sqhk.co/reparepoki/3dgdis1/90265360921.pdf
    • https://cdn.sqhk.co/luveruzosu/g39EnO2/36286195781.pdf
    • http://pitushok.space/73193735269s6tmt.pdf
    • https://cdn.sqhk.co/lexebogefaj/ijghsBY/2020_gartner_magic_quadrant_for_cloud_hcm_suites.pdf
    • https://cdn.sqhk.co/jadidawa/gifggjf/virus_definition_medical.pdf
    • http://sokfresh.fun/9782385095h3uam.pdf
    • http://gaydating.world/53122199736q0b4i.pdf
    • https://fevebelok.weebly.com/uploads/1/3/4/0/134012800/pelaloremuxefawejabi.pdf
    • https://fibimijisu.weebly.com/uploads/1/3/4/4/134461798/diguwaxebufidoxub.pdf
    • https://cdn.sqhk.co/fotenulutis/Qgjjegj/formal_word_for_pet_peeve.pdf
    • http://batmbatm.ru/webjalsha.in_720p_bengali_2019qxqae.pdf
    • https://boxoxezerutevok.weebly.com/uploads/1/3/4/3/134317212/38e40866278.pdf
    • https://nutiniwe.weebly.com/uploads/1/3/4/8/134870290/8d95fea8ff.pdf
    • https://pesukiziguz.weebly.com/uploads/1/3/4/1/134108741/1124892.pdf
    • https://cdn.sqhk.co/boguzivipel/iijdgef/word_swipe_app_android.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rifoxofome.rf.gd/baby_songs_in_tamil_cinema.pdf
    • http://zarevamemamafo.rf.gd/75806055631.pdf
    • http://nanesipub.rf.gd/28428207648.pdf
    • http://kovudefimure.rf.gd/xibiwamojegusag.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_off0000e9c7.bin
a828142400da8855cf2d4728afdd929c947fad16345757f66ebbf2dc668f67d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C7 6016 bytes
font_01_sfnt_off0000fe30.bin
ba738c166ca624b59e684e18ed5d750c6e26ec0cfedc420c7996a6dc1903a882		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE30 11216 bytes

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