Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4c5a7b5db610ca…

MALICIOUS

PDF

76.2 KB Created: 2021-02-24 21:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: aec7005fa8cf2c17fbb35c81ef79837a SHA-1: 3554102c5e81ced7c4be679d0be6645c95d7913c SHA-256: ea4c5a7b5db610ca0a71abfc1509f2c326185ca1a4c2a925ed1109006163ef2f
134 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is structured as a link farm, with one prominent URL being https://maypoin.ru/wix?keyword=apk+hungry+shark+evolution+indir. The presence of a 'download button' heuristic further suggests a deceptive download lure. No scripts were extracted, but the overall structure and heuristics point to a phishing attempt to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/wix?keyword=apk+hungry+shark+evolution+indir PDF link annotation
    • http://zememor.sportsontheweb.net/27851514679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445743/normal_600e4c15145c2.pdfIn PDF document text
    • http://dwatches.site/ingenuity_convertme_swing_2_seat_portable_swing_ridgedale_batteriesubbsj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424672/normal_5fecd1b72d479.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/duwozinatise.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422371/normal_5ffc1b9d9dcbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496374/normal_5ff8358e68add.pdfIn PDF document text
    • https://bebemabuvi.weebly.com/uploads/1/3/1/4/131453051/wuzupukikowadomineb.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/sisowonu.pdfIn PDF document text
    • https://zokevuwokonumez.weebly.com/uploads/1/3/4/6/134682223/fubebepu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403689/normal_60250e9b93747.pdfIn PDF document text
    • http://garantiya62.ru/likoxkj0aw.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/wezabegol.pdfIn PDF document text
    • http://nugudisidagok.22web.org/98582175783.pdfIn PDF document text
    • http://familyit.pro/63049972974z8kjj.pdfIn PDF document text
    • https://jokinurelebuvet.weebly.com/uploads/1/3/1/8/131856462/besibaxolesod-raset-mumidoxunula-vifotepamurim.pdfIn PDF document text
    • http://lifeit.pro/drt_be_yaynlar_ygs_matematikwj4if.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lejugolidisixod.rf.gd/61049054130.pdfIn PDF document text
    • http://bitines.myartsonline.com/96708011382.pdfIn PDF document text
    • http://wilesodirax.epizy.com/70642302862.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/15344260074.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B6 2880 bytes
SHA-256: b90b109c34db9b2d961be312c0c64f13ba4f5af9c83d6ae4556a72cb7f468167
font_01_sfnt_off0000ecf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF4 5436 bytes
SHA-256: 8c9ce397c709dace22d276d512f14f1b1fb5d52782a2b8cf96046bd94477f525
font_02_sfnt_off0000ff7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7B 10380 bytes
SHA-256: d94ba34de5ecf71bd48842dc7e6c738e40f9babc019cf6458e444b6971b9e573