Malicious PDF — malware analysis report

Static analysis result for SHA-256 43574421701237b5…

MALICIOUS

PDF

65.8 KB Created: 2021-05-15 09:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 76b73dc2b3527830def9d15b29dde236 SHA-1: e6e4ec391f3d949c025711698dfcf42fc88cfd35 SHA-256: 43574421701237b59758a599066e5f0482a4c93dcd01925c022e2ac862606454
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The document contains a large number of external links, suggesting an attempt to direct users to malicious websites for phishing or SEO spam. No scripts were extracted, but the presence of numerous external URIs indicates a likely intent to redirect the user to potentially harmful content.

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 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.
  • 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://ponafet.ru/strik?utm_term=bolens+lawn+mower+carburetor+location PDF link annotation
    • https://cdn.sqhk.co/jivonaxadu/EMjciiu/16446376485.pdfIn PDF document text
    • https://cdn.sqhk.co/puwipaneke/ieVibha/sperti_fiji_portable_sun_tanning_sunlamp_tanner.pdfIn PDF document text
    • https://cdn.sqhk.co/jojevirelo/igbaieG/mp3_cutter_ringtone_maker_pro_5._0_apk.pdfIn PDF document text
    • https://wuzikixow.weebly.com/uploads/1/3/0/7/130775075/detuguzuzexal-wazaru.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/gepjhKW/adobe_photoshop_sketch_ipad_price.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvupewog/ggkhjhc/1612906910.pdfIn PDF document text
    • https://tumuzisokume.weebly.com/uploads/1/3/5/3/135351536/8945965.pdfIn PDF document text
    • https://cdn.sqhk.co/kikepedu/jXNShe9/breaking_glass_sound_effect_freesound.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/zhgia5e/baseball_card_collection_store_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxudofexal/ficaPnE/kerexiraviwonaganutubopug.pdfIn PDF document text
    • https://cdn.sqhk.co/lepowabog/tyigijH/download_rounded_corner_pro_apk.pdfIn PDF document text
    • https://badexakabenal.weebly.com/uploads/1/3/4/0/134017850/tibaw-botafu-lojekojenalur-seguteg.pdfIn PDF document text
    • https://cdn.sqhk.co/baveninale/eibgjNE/rotoworld_nfl_draft_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/i5cqigY/translate_english_to_japanese_male_voice.pdfIn PDF document text
    • https://livupojinobiz.weebly.com/uploads/1/3/1/8/131856358/fililutarat.pdfIn PDF document text
    • https://wepebajaka.weebly.com/uploads/1/3/4/5/134588919/9100287.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/efadf756-8625-41e2-9c42-79b00d676edb/sipafifik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fd7579e-b007-472c-bd94-b857f1cb59ba/dell_u2415_24-inch_ultrasharp_led_monitor_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52b288ed-f3d5-40e2-9889-c6924faecffc/81100841021.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_off0000c6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6EE 5228 bytes
SHA-256: ae5df25ad70d6aa9e47793d1c3cbd08d4383439b896c66dd07c25e5c4b8b112f
font_01_sfnt_off0000d8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B3 9600 bytes
SHA-256: 819590e61ad81853cb55dc21e0762e16b7161a9eafdc58174b6fd2e6a500f786

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