Malicious PDF — malware analysis report

Static analysis result for SHA-256 6287241be4939472…

MALICIOUS

PDF

124.3 KB Created: 2021-03-18 13:49:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 99f8b34d7f7c84081a7efe970f414d2c SHA-1: b1eb84a545ae03d6873212675bc1d52be76a1036 SHA-256: 6287241be4939472455b4e971df0b1d0f9733a42fd2ac9d3079bb3492854ab83
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a 'Manchester airport map'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/123?utm_term=manchester+airport+map+pdf PDF link annotation
    • https://cdn.sqhk.co/mixaluwekitu/biiidZk/cute_goblin_40k.pdfIn PDF document text
    • http://zujavok.22web.org/physical_properties_of_cereal_grains.pdfIn PDF document text
    • https://cdn.sqhk.co/figoveraboj/6ejjieT/german_tank_commander_battle_of_the_bulge.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/plieIfX/51585041454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450251/normal_6043f81466519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417528/normal_5fe709baf239f.pdfIn PDF document text
    • http://rowaxamapitowej.getenjoyment.net/cognates_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/najafizox/haleCwJ/86617077478.pdfIn PDF document text
    • http://nebofimanigi.sportsontheweb.net/dirt_devil_royal_model_103.pdfIn PDF document text
    • http://gedozudusinap.mygamesonline.org/wixevaj.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/tPgcMxG/nokosekabuxumagulibi.pdfIn PDF document text
    • http://wetikufuwigiwox.iblogger.org/54289970477.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://db7841a4-af10-4990-a2be-f084cd4acbf6.filesusr.com/ugd/e3c460_c9e6d3aabfe44ad9993d1f61f9ea4aa7.pdf?index=trueIn PDF document text
    • http://gebibem.epizy.com/wimasepelamagoguxizimu.pdfIn PDF document text
    • http://degevojorak.myartsonline.com/70991974424.pdfIn PDF document text
    • http://sakoperuranabij.rf.gd/57494936583.pdfIn PDF document text
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_95cd7ea377b141859c2467e53af80423.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazutun/kamugoju.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/91092006234.pdfIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_8840625449e7460db8f26cc185d90895.pdf?index=trueIn PDF document text
    • http://jalijoruki.atwebpages.com/foundations_of_behavioral_neuroscience_neil_carlson.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/maytag_neptune_washer_vibration_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/uc_browser_pc_offline.pdfIn PDF document text
    • https://f2fffe36-c7b4-4b88-9608-518dc6c14750.filesusr.com/ugd/950b2a_33628f4317fa42fb84b63c99d14665ac.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_off0001a7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7DD 5368 bytes
SHA-256: b990bfee1816dde2cec60bd2d120429cf49de688ef94c2ba7c43e92d40e6a668
font_01_sfnt_off0001ba00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA00 13304 bytes
SHA-256: 7843137befb0486ee83a32a51140840a4a9c52ca753557a739bf54d48d4cdff9

Open this report in the interactive analyzer, or submit your own file for analysis.