Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0513ee921ffc65…

MALICIOUS

PDF

143.6 KB Created: 2021-03-08 19:53:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d724ea48e14478cce984d448e5685b7b SHA-1: 2d91334cf560313ac20d4bb1977833861a5540af SHA-256: 8e0513ee921ffc65ec7be99f25fb4279804650c4d6baa5fa20a3b29a879de54b
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites, some of which are hosted on disposable domains. The primary lure appears to be a search query related to the origin of Christianity, suggesting a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and embedded URLs indicate malicious intent, likely to lead users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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 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://golowaki.ru/aws?utm_term=what+is+the+origin+of+christianity+religion
    • https://cdn.sqhk.co/tajiwikiter/M6gdQFW/freeze_dryer_for_food.pdf
    • https://static.s123-cdn-static.com/uploads/4470703/normal_5fd08c34f2118.pdf
    • http://rebezun.mygamesonline.org/kitchenaid_stand_mixer_tilt_5_quart_rrk150wh_artisan_tilt_white.pdf
    • https://cdn.sqhk.co/mowanideju/cigifhc/frog_jumps_exercise.pdf
    • https://cdn-cms.f-static.net/uploads/4382208/normal_6016515f0438d.pdf
    • https://cdn.sqhk.co/nuxarufodir/PR7UUic/5856165890.pdf
    • http://xutexukoxobofi.mywebcommunity.org/hampton_bay_ceiling_fan_model_ac-552al.pdf
    • https://cdn-cms.f-static.net/uploads/4444657/normal_601082578ef5d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_0c312b9925844a0281429aa244d53289.pdf?index=true
    • https://4dd62b93-bb0f-494d-9363-2046eec350ea.filesusr.com/ugd/e54fc7_51a5aa9055d44cdc8af136bbba9cf7d6.pdf?index=true
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_c4423b2f8bfb4c03b178c3b42b3c9a8f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ebe700b8-c70f-4fc2-ab51-c63234e101d5/pete_the_cat_saves_christmas_song.pdf
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_812862da59914be09dc039b6ac9139fc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7f33604d-5083-4fc9-a783-c1745bf5bd8e/lanazijudaroxamulopora.pdf
    • https://uploads.strikinglycdn.com/files/d6ccec67-9841-48f5-bc8c-cbf432415043/logojituzuralubomikak.pdf
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_2fe47b9755ac467a8ad6546c34f50386.pdf?index=true
    • https://a765b249-d442-4b07-8ea9-8318d996b894.filesusr.com/ugd/902d29_0916d220970a430c958ad3fb7695ef74.pdf?index=true
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_3b30417cd36e42e7868d18b948464cdf.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f0f1.bin
f89d0b4a4f6416767f6a24e83814a4daef18efbc69d3eea692bab26920d59f9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F0F1 5256 bytes
font_01_sfnt_off000202e9.bin
c189db8192f5a16ec8d6be6a93eb362cd5bcac9e7628bee650fbfd497016dc5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x202E9 15144 bytes

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