Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af6e35e4188e414…

MALICIOUS

PDF

89.4 KB Created: 2021-03-18 00:16:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ad0684b3bba81cb1e56e22d7dd400224 SHA-1: 134b4e1efa3b0417dcf1f4c8369ea7fb0d780a9d SHA-256: 1af6e35e4188e41471c1f0720df082de86e24bcc4f3cec081ac69ab0c62c0c3d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9961

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://jottigo.ru/123?utm_term=nice+guidelines+colorectal+liver+metastases PDF link annotation
    • https://cdn.sqhk.co/ferorigife/Ujegp9H/the_last_door_gamefaqs.pdfIn PDF document text
    • https://cdn.sqhk.co/zalopubid/9jHjbie/zibojixipan.pdfIn PDF document text
    • https://cdn.sqhk.co/bagozujetim/H6Ohiig/93219499264.pdfIn PDF document text
    • https://cdn.sqhk.co/jujirepak/djghg6P/vipub.pdfIn PDF document text
    • https://cdn.sqhk.co/sovixojer/wW8hghj/burn_out_drag_racing_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/vjjIHjd/wumafujifexod.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/s9MghWX/60199982597.pdfIn PDF document text
    • https://cdn.sqhk.co/bezakebijuk/c7Nxqgj/mokaxiwed.pdfIn PDF document text
    • https://cdn.sqhk.co/fipakebeb/lweRwo3/android_car_stereo_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/luvafuza/exjeDja/83604133421.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/a2a817a5-e6df-42d2-bf36-c39db032a28d/28504267508.pdfIn PDF document text
    • https://a0d2adcf-75bd-42a9-a42a-c23e1c6e9e1a.filesusr.com/ugd/85c99c_861e2ac7524943808ff0064b8419ba03.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d405922-5710-4548-8d40-c62ff3fb3bfe/linogirumebuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46b4d517-05ea-45e2-adc6-c457971e8f87/94235161403.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/zowunisupiwedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e14226c-7f6d-43da-8b26-b25cc7a56e1e/rejerulogifix.pdfIn PDF document text
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_c95f354aa0a84838bf6840c460295323.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/89975264734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/504b5549-f93b-4d1c-b244-8379f0f01cd4/86552985531.pdfIn PDF document text
    • https://502f924d-676a-41b3-8220-87c01882f600.filesusr.com/ugd/5a20bb_ef79e2d88f0a4385b3979dff43114c2a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/687f58f3-543d-401e-b2d3-d53c85728908/gonaxuboli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b8b5201-bb27-48ec-b269-3568fb956f75/delonghi_dragon_1500w_oil_column_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f685f47c-23ae-45d0-8682-a0858b3bb3d0/what_is_the_difference_between_ergobaby_360_and_omni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/252061fe-9994-41d1-a69e-1ac9bc6886ed/wivosedivilap.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/34341628059.pdfIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_8061ad0cfd684b26aca5b7a109eceaa1.pdf?index=trueIn PDF document text
    • https://medlineplus.gov/liverdiseases.htmlIn 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_off0001213f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213F 5288 bytes
SHA-256: 562fb19635707fdf29f8a57b4b95f4d43bc65acac555c64789b1fbab400e0e96
font_01_sfnt_off00013335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13335 10672 bytes
SHA-256: 96b78b83951a0606d4181b5d8b35b0623bc79dd67ad499bfbf30353e9d563e49

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