Malicious PDF — malware analysis report

Static analysis result for SHA-256 e15aa8b06f76f271…

MALICIOUS

PDF

78.0 KB Created: 2021-03-25 23:38:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5b60b9c581c21d7d9e347becf201b82b SHA-1: cdf33f6a2c5f9a111abbbd8f4bf109a775f9e2f1 SHA-256: e15aa8b06f76f2715ad98f950c4dd8da36ae2d63c38ca0115fb98c697b2f6508
254 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic to direct users to malicious sites. The document body, though heavily obfuscated, contains keywords related to customer service and donation requests, likely serving as a lure to encourage users to click on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 9

  • 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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://fokemale.ru/wix?keyword=meijer+customer+service+donation+request PDF link annotation
    • http://youtube-subscribes.com/name_generator_5e_humanzfq0t.pdfIn PDF document text
    • http://domastmsk.space/maze_runner_death_cure_netflix_release_datelx46v.pdfIn PDF document text
    • http://zeropium.com/34611411160khjhl.pdfIn PDF document text
    • http://lefuvaguvupawax.iblogger.org/savanefob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_a2a954f33d944a858bc0d7459f92c594.pdf?index=trueIn PDF document text
    • http://fugazite.epizy.com/rorowejokuminedeteziluwom.pdfIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_3d4ee678e98d4eed87cbaf71d748f972.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/160a7554-e2cb-4ecc-8f58-939a279d82fe/king_kutter_60_inch_tiller_manual.pdfIn PDF document text
    • http://pidejekakej.epizy.com/64596321087.pdfIn PDF document text
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_63a3c66b267243d5a3148acc0966f05d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b84c3c76-23b6-4d61-8366-d3416206bddb/xivuwanodowekafokuxov.pdfIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_bcc86dc5f4be41c9adf4b99f0abe93f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/44191450-4d52-4a46-817c-67a7b992bdc0/how_to_setup_ge_universal_remote_for_sanyo_tv.pdfIn PDF document text
    • http://zezunas.epizy.com/79170807738.pdfIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_dd2c213b662348f0aa50b6d6ca2ed6ec.pdf?index=trueIn PDF document text
    • https://16fd32d6-95e0-4b29-89ad-7162b4f2ffbe.filesusr.com/ugd/9f4b57_d8c4bd8a9abf45e5b9c604a3d10c65f6.pdf?index=trueIn PDF document text
    • http://nolusiwafaki.epizy.com/xakiwetunotem.pdfIn PDF document text
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_27a6d1c8fcdb433da36c00b840dea37e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2828c3b5-2e39-4b7e-9408-4f12dab70598/vupobufiwij.pdfIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_318a2e95b3884c1a9623ac486fff306b.pdf?index=trueIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_5dc209f986ab407a8d8141bd56fd07cc.pdf?index=trueIn 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_off0000f2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E9 5320 bytes
SHA-256: b9b218d3d7490e126c9ef79d27f48b1eea2a566e05acd0c233d66453b68e8b05
font_01_sfnt_off000104fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FD 11104 bytes
SHA-256: 3129192a84496d2af3e00f08e8bfb25912d504aac3761666bbd7952c72785f85