Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd705f4f4d98c1c3…

MALICIOUS

PDF

77.2 KB Created: 2021-04-14 02:36:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: faf441f0c97a253f97e36dd45190e0c0 SHA-1: 5bbf60ecdd2fe49324bf6fd7986fb87b179b444d SHA-256: dd705f4f4d98c1c3fce3b5da54408e543b5a58b311501e8fa28e242629e59dc2
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 0.9993

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://fokemale.ru/strik?utm_term=hp+photosmart+5520+printing+problems PDF link annotation
    • http://vorgazme.com/fuvimomapokqtyrh.pdfIn PDF document text
    • http://ecoterritory.store/lighting_handbook_10th_edition_free1x36z.pdfIn PDF document text
    • http://detonic-ro.website/what_is_it_called_when_you_cant_focus_on_one_thingv48kt.pdfIn PDF document text
    • http://fulifubajamo.mywebcommunity.org/uud_1945_amandemen_ke_4.pdfIn PDF document text
    • http://kino-vezde.ru/2002071964n0063.pdfIn PDF document text
    • https://rinuvimasajef.weebly.com/uploads/1/3/2/6/132695862/kokidupek.pdfIn PDF document text
    • http://salestore.pro/advanced_spanish_grammarmvyvq.pdfIn PDF document text
    • https://bivejeweki.weebly.com/uploads/1/3/4/3/134322338/sonewazezinufi.pdfIn PDF document text
    • https://lurakowufo.weebly.com/uploads/1/3/4/4/134457973/resupike.pdfIn PDF document text
    • https://bobuwazubugomu.weebly.com/uploads/1/3/4/4/134494734/9136389.pdfIn PDF document text
    • https://tabawowap.weebly.com/uploads/1/3/4/5/134599755/f77a6319.pdfIn PDF document text
    • http://mevixonur.mywebcommunity.org/introduction_to_business_information_technology.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/getizar/lelaxuxupupabufojaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/44884786690.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/day_1_piano_sheet.pdfIn PDF document text
    • http://gagowud.epizy.com/41582554640.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/ribenezoga.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/75951527790.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/barriers_of_listening_skills.pdfIn PDF document text
    • http://logiweliziweje.onlinewebshop.net/atharvashirsha_pathan.pdfIn PDF document text
    • http://gupubagixigopi.epizy.com/26926482755.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/51485960598.pdfIn PDF document text
    • http://jotozig.rf.gd/eeo-_1_reporting_period.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 5732 bytes
SHA-256: 7a83a9c75429844099d626ea9ad22ec842f7aef26c1ce175ee1f6bbd9276f5bf
font_01_sfnt_off000103b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B7 10476 bytes
SHA-256: 5d674f399514f2afcb7a563c27609a7d5815e7b0ee76be8164a80b74a5866d13

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