Malicious PDF — malware analysis report

Static analysis result for SHA-256 e688c7f0a5bb3db5…

MALICIOUS

PDF

77.8 KB Created: 2021-03-23 21:16:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 88430f35d66a0657a8985f08153cc81b SHA-1: 1107cfaf97c753505bd6defde665c3243d940687 SHA-256: e688c7f0a5bb3db52e782aa5e7335692aff62108fdd2943df59361739e72424d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/aws?utm_term=sears+sewing+machine+model+385+manual'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body indicates an attempt to lure the user to a compromised or malicious site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/aws?utm_term=sears+sewing+machine+model+385+manual In PDF document text
    • https://cdn.sqhk.co/xefijumu/iNibtTB/21668238028.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/igggiib/civil_war_battlefields_in_ky.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392457/normal_5fcf7f768c28f.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/ajh7ghZ/bafivovo.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/2nzclic/vegan_chocolate_chip_cookie_recipe_no_coconut_oil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405413/normal_602da63bdd75c.pdfIn PDF document text
    • http://creamwalls.space/25661525008x7r07.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipufo/hg0FeKs/world_war_2_deaths_by_country.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392667/normal_5ff8b7cac01c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501042/normal_5ff41331a7e42.pdfIn PDF document text
    • http://iranianvc.com/3305086745m7lc7.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/ijjgiaP/54562791855.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/ijhhrwJ/.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/jk0iajb/messages_icon_png.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/nhhbrlI/sibilapupi.pdfIn PDF document text
    • https://cdn.sqhk.co/pisapaxosabo/76SmMgg/love_and_respect_conference_orlando.pdfIn PDF document text
    • http://beautysss.site/procedimiento_de_administracion_de_medicamentos_por_via_parenteralv43gh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459054/normal_60212c8a0907a.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/9aee7af8-95c5-42d8-b687-42a5546553d2/how_many_calories_are_in_an_arbys_fish_sandwich_without_the_bun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/842d38b4-1f4c-4a01-a1c4-d2e13df0dbd1/jovujalojajaziki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ff59b27-11f7-435a-ac65-55e19ec4fcd4/fobawopafugujiliwam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd07daeb-ddb1-4e99-a137-38419dead5c4/linksys_ea6350_ac1200_dual-band_wifi_router_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2363ad8-536e-4d12-8750-c4d12f5bbe3a/can_you_convert_to_jpg.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_off0000ec13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC13 6028 bytes
SHA-256: 3b51c4bc92500654a0826514672dedd071015aeb2d60b03e7f662ffc6808c4a1
font_01_sfnt_off0001007b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007B 12012 bytes
SHA-256: dd2867c9366c4147fc657a26f297d6880cf70b966f14d768990647890ccf7367

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