Malicious PDF — malware analysis report

Static analysis result for SHA-256 986c88aa9c89e235…

MALICIOUS

PDF

118.7 KB Created: 2021-03-11 19:18:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 126392663ddea00cc3fdbaace98333f2 SHA-1: 5168efb9184e656d02548b13a3bc20f9899b3a9c SHA-256: 986c88aa9c89e2356e79acbf0950202dd11116b9d4890e897caff2328f8a466c
166 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. It uses a password-protected-archive lure. 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 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/award?keyword=aura+by+carlos+fuentes+pdf+english PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387826/normal_60272f00b316d.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/razikaboviwupamamifu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470223/normal_5fccebe82cc77.pdfIn PDF document text
    • http://lubevos.scienceontheweb.net/66962423445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_6034d1e32e5c6.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/826454895876tg8a.pdfIn PDF document text
    • http://lassituda.online/fupevaq0853.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/21018283231.pdfIn PDF document text
    • http://kogemotuju.getenjoyment.net/what_does_a_pre_purchase_inspection_include.pdfIn PDF document text
    • https://zavodazokexa.weebly.com/uploads/1/3/4/6/134632977/6676248.pdfIn PDF document text
    • https://bimuwosexiwo.weebly.com/uploads/1/3/1/1/131164043/makujutisizojel.pdfIn PDF document text
    • https://mujesazuf.weebly.com/uploads/1/3/2/3/132302915/5280123.pdfIn PDF document text
    • http://muzesumulel.getenjoyment.net/smoothie_recipes_for_kids.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/dead_space_3_awakened_itajz6ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6bb4886f-d63d-43e6-86eb-b8f76a9cb121/how_much_does_family_dollar_pay_cashiers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee13b2cd-61e1-455a-acf3-f3cdbda32fa1/how_to_manage_post_acute_withdrawal_syndrome.pdfIn PDF document text
    • http://revodez.myartsonline.com/37146611341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74d36b85-d51b-412e-a774-7f7ea2b4050e/sony_ericsson_mw600_manual_espaol.pdfIn PDF document text
    • http://bavevex.onlinewebshop.net/95084243802.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9da3e5c1-ae4f-4308-ad5c-b97ba46538b0/52740151918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bc3eba4-242d-4178-9a77-1512bb43837f/grade_11_college_biology_textbook_online.pdfIn PDF document text
    • http://wutesejib.onlinewebshop.net/doposoxemibose.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E0F 5528 bytes
SHA-256: 7b28a9624204eb313a0cfa097163507cad662e17bc99b59b12d86a847cd5dadc
font_01_sfnt_off000190c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190C7 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00019955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19955 11056 bytes
SHA-256: 69859ee0ca1238d0954ac6acf3e3d158d49f5fe98d777ed46456fc66adee5aa2
font_03_sfnt_off0001be68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE68 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34