Malicious PDF — malware analysis report

Static analysis result for SHA-256 68588d5578680110…

MALICIOUS

PDF

79.1 KB Created: 2021-05-29 08:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9dc8ba9aa56f96c5db44578040dea946 SHA-1: 749032688d59ea77dd860fbe8cdc1b6b9d886631 SHA-256: 68588d5578680110e425c3e734d1907385c8fc50e7edb61c3bc8c0ad26b134d1
206 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 QR-code 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 0.9998

Heuristics 7

  • 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.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://baarspo.ru/strik?utm_term=download+whatsapp+plus+ios+7.1.2 PDF link annotation
    • https://zapufotipo.weebly.com/uploads/1/3/2/7/132740892/sexumiki.pdfIn PDF document text
    • https://sudusiwigi.weebly.com/uploads/1/3/1/0/131069987/xutaduparurot-wipeza.pdfIn PDF document text
    • https://vetaneje.weebly.com/uploads/1/3/4/7/134729364/3ea5c0c.pdfIn PDF document text
    • https://jotabaputeja.weebly.com/uploads/1/3/5/3/135350690/482a8077c6bc5.pdfIn PDF document text
    • https://vufomugivubi.weebly.com/uploads/1/3/5/3/135350936/muxekux-demanoxi-fiked.pdfIn PDF document text
    • https://suxokigivulumu.weebly.com/uploads/1/3/4/4/134479742/9852757.pdfIn PDF document text
    • https://tejekukukageza.weebly.com/uploads/1/3/4/6/134662245/rugudizinewebi.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/ac8ffd6f-bd12-46da-a13d-e5e45334c055/34477485474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab9148b7-c461-4fe4-8348-2a9499ebdbab/wamitizuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dbf6b7c-7c72-4e13-b937-0ea57412eba5/difficult_origami_dragon_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30a663b2-79c2-4484-a9f2-4199d02c455a/how_to_get_a_distorted_guitar_sound.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d1ee56-d6da-4e7a-a664-235201fed4f9/cause_of_tiny_whiteheads_on_forehead.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7292566-0412-47c4-94ad-a6a22324a6b7/1240583048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6921bade-ec8a-4555-9c56-4dc64e767a2d/tigopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/513c240c-feed-49cc-8966-b903aed04933/brother_p-touch_model_pt-h100_tape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc05ffa6-5c6a-48c5-89d5-3d7ef234633a/the_yawning_portal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9bd755f-3bfe-40dc-a61e-fd0c5ecc4587/elite_dangerous_reload_cannons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44d1b310-a357-4606-9cc6-159f6b8b5376/power_book_of_ghost_episode_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/350c65b9-f74a-4af8-9546-60132ce33486/how_to_fix_samsung_dishwasher_door_latch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60bf9c4c-f028-4610-b9b2-d5bfad9d5461/charger_for_doro_6520_phone.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_off0000f80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80F 5336 bytes
SHA-256: fa51484c7f2aa5d87d1c26f5595a1737e60fd2e2d6b11f351f503331388aa598
font_01_sfnt_off00010a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A60 11004 bytes
SHA-256: 414ecfc618b54d5a6c95f59cb2665c5004dd7a8680252e04c98d86c207e6d205