Malicious PDF — malware analysis report

Static analysis result for SHA-256 158980da1387c531…

MALICIOUS

PDF

84.4 KB Created: 2021-03-20 14:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de792adde4abe0155a97ee14595984f2 SHA-1: edc47d39662ed8ac7f83888cd9b973fab5e670b3 SHA-256: 158980da1387c53156e25c0388020dd29b0b0cdadc7a2ce7689a57d4df8d3bf7
176 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, many of which are SEO-themed, suggesting an attempt to generate traffic or host malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in tech support scams. While no scripts were explicitly extracted, the presence of numerous URLs and the heuristic firings strongly suggest a phishing or scamming attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://xezojetit.ru/award?keyword=capitec+bank+bursary+application+form+2020+pdf
    • http://jadogaxarabu.mygamesonline.org/pageru.pdf
    • http://kutatit.getenjoyment.net/96944205142.pdf
    • https://cdn.sqhk.co/vixemujomu/GSgfrhf/33251202087.pdf
    • http://sarkife.site/sizalizeganedonososrefm5.pdf
    • http://pidagenavuziw.mywebcommunity.org/midnight_sun_cast_2020.pdf
    • http://fruitslope.online/nuvobikefuberiteseragesfap5r.pdf
    • http://pewujok.mypressonline.com/how_to_set_time_on_a_lorell_radio_controlled_clock.pdf
    • http://vanimerukaguto.scienceontheweb.net/rubexopi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/xefezesebusu/dappu_srinu_ayyappa_swamy_songs_telugu.pdf
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_eab49fad4e3348899ff39e9b69d5c132.pdf?index=true
    • https://s3.amazonaws.com/xarojapi/prepositions_of_place_worksheet_beginner.pdf
    • https://s3.amazonaws.com/divelatoxa/72819119426.pdf
    • https://s3.amazonaws.com/julexekubaj/two_way_radio_headset_best_buy.pdf
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_f7591077e71747049d70bb07b7583f6b.pdf?index=true
    • https://s3.amazonaws.com/kofabube/nemomaluviwo.pdf
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_65fe23758d0c4694a0f4afe247c6b927.pdf?index=true
    • https://s3.amazonaws.com/nevovumowa/18457371356.pdf
    • https://s3.amazonaws.com/xulepiwa/image_slider_html_template_free.pdf
    • https://fe426b01-1dd0-498a-b08e-7ec37e320b94.filesusr.com/ugd/6b45f0_cbee8e155a1b4ab795cca5c4031152eb.pdf?index=true
    • https://s3.amazonaws.com/poresi/damuvanuga.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb9d.bin
18d0a2941c9140ac0cc26ad53ffa6f520ba426ed10a94117cca4a8cb3b8d478c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9D 5784 bytes
font_01_sfnt_off00010f3b.bin
433f9330835a33b4a03e995cf827603e9ab28c3b2ed0f5d7e1e7dcaedcde6865		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3B 11372 bytes
font_02_sfnt_off000135d6.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135D6 4324 bytes

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