Malicious PDF — malware analysis report

Static analysis result for SHA-256 37db8f01e47297e6…

MALICIOUS

PDF

75.7 KB Created: 2021-04-04 00:18:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7d397a62584671c3ea4c19ee6ee814a9 SHA-1: 4ab60c664963b9dfea14ee5877515c8fd9f1630c SHA-256: 37db8f01e47297e64bf52b98a41d7aa30ed1271237e4509d33be62ebbbbca5c6
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The embedded URL points to a suspicious domain, likely used to host a malicious payload or redirect to a phishing site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit vulnerabilities or trick the user into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://baarspo.ru/strik?utm_term=how+much+do+navy+chaplains+make PDF link annotation
    • http://inglassrus.ru/can_i_use_any_developer_with_igora_royal5bql8.pdfIn PDF document text
    • http://jusegoma.22web.org/aspirantszone_current_affairs_march_2020.pdfIn PDF document text
    • http://rinobozawizuvew.iblogger.org/vewerek.pdfIn PDF document text
    • https://cdn.sqhk.co/xugosovemi/hghbjby/island_color_with_oak_cabinets.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuzigup/gjhPNgg/viguzu.pdfIn PDF document text
    • https://fukenotaza.weebly.com/uploads/1/3/2/7/132740373/9870817.pdfIn PDF document text
    • https://gosazakinuda.weebly.com/uploads/1/3/4/8/134861856/2557811.pdfIn PDF document text
    • http://onsideball.info/93412040146k7kv2.pdfIn PDF document text
    • https://cdn.sqhk.co/xidafigutoxa/cDR1IOt/tigaro.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/jazelivutawe_rukuvolonev_vezusoguwori_xisitebemobiwat.pdfIn PDF document text
    • https://vurerabekude.weebly.com/uploads/1/3/4/4/134493837/zabazugemaxata.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/how_much_weight_can_a_atv_hold.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d16bcffa-2ee4-47d6-b748-cca7166fb599/how_to_activate_dunkin_donuts_gift_card.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/nazuvamanij.pdfIn PDF document text
    • http://fomebitatabapid.epizy.com/dikawijuza.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/ketogenic_mediterranean_diet_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02d49c94-8508-4101-a536-a0487adc859a/how_to_make_a_mind_map_for_biology.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/blank_world_map_with_countries.pdfIn PDF document text
    • http://pusevim.epizy.com/21926550881.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/cost_of_goods_sold_schedule_template.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_off0000e9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D5 5496 bytes
SHA-256: 7ddf85d8b8b823cc9822b17c48955e3a3591037be94caa5a75938548f06d08d1
font_01_sfnt_off0000fc7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7E 11028 bytes
SHA-256: 127e3e9d86baf0b5dc3040725c7283339664e589a02c695b7ccc56ab2a207f07

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