Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c0815e296035da…

MALICIOUS

PDF

88.3 KB Created: 2021-04-11 15:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9e18e2bc49c152a6375f076e34658a9a SHA-1: b50e1bfdada27be1996b9ec3c5f2593e6ebb75e4 SHA-256: f6c0815e296035da37e04157a5e451b2610dae52236fd25f1690d7aa96532fc3
226 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. It uses a password-protected-archive lure. 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 0.9989

Heuristics 7

  • 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.
  • 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://dafemum.ru/strik?utm_term=persepolis+comic+summary PDF link annotation
    • https://xabonawof.weebly.com/uploads/1/3/5/9/135965837/bezimiwozakoj.pdfIn PDF document text
    • http://shoop-ff.ru/tajeduvufebom6e6be.pdfIn PDF document text
    • https://jowatewiko.weebly.com/uploads/1/3/1/3/131380225/wixepozo.pdfIn PDF document text
    • https://tabofeluraratub.weebly.com/uploads/1/3/1/4/131438776/1e15e93dec49ca7.pdfIn PDF document text
    • http://petersikdar.com/what_do_you_call_a_highly_sensitive_personde9f8.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://dojifidixiwaji.weebly.com/uploads/1/3/4/3/134372722/kikemoxunowedi.pdfIn PDF document text
    • https://tovalowu.weebly.com/uploads/1/3/4/3/134375552/sexafela.pdfIn PDF document text
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/886b1bcf9e.pdfIn PDF document text
    • https://jesodiretax.weebly.com/uploads/1/3/4/6/134659119/5164142.pdfIn PDF document text
    • http://fastdonwload.space/5687260533154oex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lakadutof/what_is_the_navy_seals_fitness_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65e937ec-22e3-4412-8b02-84e81cda6773/someginikowogiru.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/how_would_the_stimulus_check_show_up_on_bank_statement.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/chiasenhac_apk_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d2e186a-7416-403c-8002-5c48e450f859/31014039179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46644fed-5d3f-4ce6-a0ae-99edef741e4e/riwunox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d311c659-ff01-462a-ad05-9ee974b2d220/pepakarazazude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3375e783-8384-4e00-88e0-d1ec989fc627/how_to_install_focusrite_scarlett_18i8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c441c5-c320-4855-bc0c-c1495347aabb/hello_adele_chords_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef49c233-94d9-4512-93a5-bf1ddcc04f64/luxuzimalawutamowokowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0772166-5e77-435a-bd97-df8f73c24d57/holmes_egg_air_purifier_hap600b-tu_filter_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/on_my_way_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6f1d5f6-248f-45f8-84c3-49ab063ec3e3/how_to_become_appliance_repair_technician.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/balunga_toka_odia_film_song_free.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_off00010573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10573 5184 bytes
SHA-256: c7288c68defe69c547ae2d81dd72d7097925788dd27379e74e29cc25286e8bd9
font_01_sfnt_off00011700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11700 11056 bytes
SHA-256: 98d4a8772268a18effef5f15a66738f32dff38c70cc1366686def37926ed158d
font_02_sfnt_off00013c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C93 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449