Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b54626b5a799a10…

MALICIOUS

PDF

73.6 KB Created: 2021-03-27 22:18:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 710020aee095a8d4a6b2bc307429e2c8 SHA-1: 5debfb58cff20d66dc31d543bb17dab3856c8a98 SHA-256: 8b54626b5a799a10f1a30c2ff831269e637e158d945822b660487f0aa925cb2b
186 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. 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 0.9990

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 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.
  • 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://jottigo.ru/wix?keyword=phet+molecular+shapes+vsepr+lab+answers PDF link annotation
    • http://fomilexavekol.22web.org/autocad_2010_full_crack.pdfIn PDF document text
    • http://magic-world.site/ball_bounce_apkpurecbycv.pdfIn PDF document text
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/raziruzexilora_finadebir.pdfIn PDF document text
    • http://lirerigoteses.22web.org/gokazugo.pdfIn PDF document text
    • https://puxanakiwe.weebly.com/uploads/1/3/2/6/132695454/612086.pdfIn PDF document text
    • https://buwigare.weebly.com/uploads/1/3/5/3/135308802/nelofex.pdfIn PDF document text
    • http://1xbets-reg.site/16425038186yf117.pdfIn PDF document text
    • http://online-bestshop.xyz/fuvelevujopozigegetaf73.pdfIn PDF document text
    • http://sportplays.ru/baby_adopter_appgugss.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ac09d6fb-20d1-47e2-97cb-2568fc137cdf.filesusr.com/ugd/03dcd4_bca7cf20d5bb46c591c84c8bd2d28b8b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b29b843-6e49-4a95-9f93-d227647825aa/how_do_i_stop_my_first_alert_smoke_detector_from_chirping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e1734ef-9ce2-4a5a-9ca0-2557702114e8/presto_cool_touch_electric_griddle_07030_parts.pdfIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_ac1149445b614f40957230b1d9931516.pdf?index=trueIn PDF document text
    • http://jazupizewatabal.epizy.com/vopirujurepejesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df74dfc4-943f-456c-acef-0cb6f17ad32b/haier_2.7_mini_fridge_white.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc6f80fb-aa04-4a98-831e-fcd94ff87443/quiero_aprender_ingles_rapido_y_facil_por_internet_gratis.pdfIn PDF document text
    • https://d5cf7a15-73c9-49c9-ad57-d4f0303abb0c.filesusr.com/ugd/0d002d_087b8a8739704a0dae45fd170fc689bc.pdf?index=trueIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_99a4cdbf66bd48409bdf8722fc1c6189.pdf?index=trueIn PDF document text
    • https://76b44699-1094-4fd8-8d4a-70b7be8159c3.filesusr.com/ugd/c450b2_81927d7492fa4a9099281d584c9826ad.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f83bd5a0-f15e-4dd6-afb4-0c4d106dc30c/xukaridilevivepaxif.pdfIn PDF document text
    • http://wimosatemegof.rf.gd/15439411877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e2422ae-90ae-4a80-b103-9a597e9db816/diono_radian_rxt_installation_forward_facing_latch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50ac3028-ccc1-4e7a-9977-28dea7b58e89/9493522502.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCB 5464 bytes
SHA-256: bd7388b34014ed8eaf2dd68a1137895d4940cf44127899ccc8171c2290e51f67
font_01_sfnt_off0000e046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE046 10140 bytes
SHA-256: 9e77832a0cd97ab773a1059bfc2687c5f5a67b9a3632c831b532f50619192e00
font_02_sfnt_off0001033b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033B 16136 bytes
SHA-256: 8d0ca5441952925faa6f68d28470995fcd5e3edd800b1977fac83179433ae1db