Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5d414865ade8c1…

MALICIOUS

PDF

76.1 KB Created: 2021-06-01 16:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52251c46de3ce630f2c75d62b29a1927 SHA-1: 0937fa93dae0dde30f02a4accd8f37dc84b5f268 SHA-256: bd5d414865ade8c1947bd409caa41593bbbb1d3cb825c83cff4b6b482a207646
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm, indicating it hosts numerous external links. One of these links, 'https://crysiq.ru/pbw?utm_term=download+lagu+say+yes+ost+moon+lovers+mp3', suggests a lure for downloading content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7191

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://crysiq.ru/pbw?utm_term=download+lagu+say+yes+ost+moon+lovers+mp3
    • https://ralokokotozupar.weebly.com/uploads/1/3/4/3/134340958/larojizaxolage.pdf
    • https://wupizesave.weebly.com/uploads/1/3/4/5/134581048/jazejelopexa-sesopijuvudi.pdf
    • https://static.s123-cdn-static.com/uploads/4368506/normal_5fecfb8f469c2.pdf
    • https://tibirodemoxojuf.weebly.com/uploads/1/3/4/3/134336787/nalosa.pdf
    • https://jedunaxalow.weebly.com/uploads/1/3/1/6/131606453/gonim-bapibubin.pdf
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/laxapake.pdf
    • https://dukazegisow.weebly.com/uploads/1/3/0/7/130740117/6815840.pdf
    • https://bupuzufemu.weebly.com/uploads/1/3/1/4/131452870/9440296.pdf
    • https://vifekifuveju.weebly.com/uploads/1/3/4/5/134597055/zupaw.pdf
    • https://static.s123-cdn-static.com/uploads/4496826/normal_5ff5638e08c46.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vatojorisa.pbworks.com/w/file/fetch/144442584/what_is_catbird_seat_definition.pdf
    • https://uploads.strikinglycdn.com/files/7e775dc2-0c61-4036-bb8f-5238f2c4a911/gta_san_andreas_lite_apk__data_download_200mb.pdf
    • https://uploads.strikinglycdn.com/files/4dadeadf-661c-439b-b378-8f166347d2da/a_dolls_house_summary_free_download.pdf
    • https://uploads.strikinglycdn.com/files/3e6be739-3464-43c7-9be2-202303669ef6/mayors_son_off_horton_hears_a_who.pdf
    • https://uploads.strikinglycdn.com/files/03b172db-98df-4e93-9ea6-eff26ad0c45d/49201260723.pdf
    • https://uploads.strikinglycdn.com/files/014636fd-ddc5-465d-a394-724d3e0bb82c/uniden_dect_6.0_phone.pdf
    • https://uploads.strikinglycdn.com/files/d77d431f-582b-45fe-97d3-422f4f7f6193/naniteravosexupagur.pdf
    • https://uploads.strikinglycdn.com/files/616c9b3e-e4b2-4648-9231-aac69f61e2b6/arbys_regular_roast_beef_nutrition_facts.pdf
    • http://venatulafiz.pbworks.com/w/file/fetch/144425676/novio_por_una_noche_online.pdf
    • https://uploads.strikinglycdn.com/files/63bfaae5-c193-4e08-9874-9b608d853f82/zovawam.pdf
    • http://natizasex.pbworks.com/w/file/fetch/144412263/9805275689.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e296.bin
750b86d3a4e0e2e7656791c793ab27f7e4fd3f421237bf9d400efd9e0c561ccf
pdf-font-stream PDF embedded font (sfnt) at offset 0xE296 10916 bytes
font_01_sfnt_off00010641.bin
671713843b399698f5630ab8bca8e4273f1dc22d1c21a7285ed957a1af454e5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10641 5696 bytes