Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f0defc183e99fb…

MALICIOUS

PDF

78.1 KB Created: 2021-04-07 03:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8c38df1a171b26410a8ff2547bd86ab3 SHA-1: ec55c8b035ed656f2ce8f1e726ffe5f55ea39859 SHA-256: 58f0defc183e99fb59e8545e08420fa4a12ec89dc3f7625462287c659a1a25f5
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://kuzutuzo.ru/wix?keyword=haldex+hydraulic+pump+specs PDF link annotation
    • https://cdn.sqhk.co/xovikojux/fhcRCid/warpath_marvel_movie.pdfIn PDF document text
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/jijowa-wisunisawel.pdfIn PDF document text
    • http://kuzamejeluwezik.22web.org/index_card_word_template.pdfIn PDF document text
    • https://sizunevasiwi.weebly.com/uploads/1/3/5/3/135310428/7748380.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/gjjeVjh/jasuvurukosoruz.pdfIn PDF document text
    • https://jotonude.weebly.com/uploads/1/3/1/3/131398177/c1f2686925faf8d.pdfIn PDF document text
    • https://tevoletefe.weebly.com/uploads/1/3/1/6/131606261/b626c6c1139d.pdfIn PDF document text
    • http://futajef.medianewsonline.com/zekawazifogifemesu.pdfIn PDF document text
    • https://rofosuvobatijam.weebly.com/uploads/1/3/4/6/134661532/romilivawu.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/zatixoferipolezeba.pdfIn PDF document text
    • http://tapabafana.22web.org/wisonejasoweluravix.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/XWwjfif/xejemafimafepes.pdfIn PDF document text
    • https://vemenujobife.weebly.com/uploads/1/3/5/3/135399872/8abc1b1d65c7424.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xeliposemufara.rf.gd/data_scientist_salary_in_austin.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/how_to_reset_my_timex_ironman_triathlon_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/can_i_use_my_phone_as_a_hotspot_while_on_wifi.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/66404032494.pdfIn PDF document text
    • http://zorubanalu.epizy.com/xixiwivegule.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/late_answer_in_french.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/can_android_music_from_itunes.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_off0000f06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06A 5444 bytes
SHA-256: 3d49be6e60c5d544fceb8401c7905e9f398aee452247a7214178754dc1398e8d
font_01_sfnt_off000102c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C2 11884 bytes
SHA-256: 09eda2c6b0180735c7b83f26f1aabb72ba87943c3c6661c153727ba14b563eb6

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