Malicious PDF — malware analysis report

Static analysis result for SHA-256 27d7e90278c311d2…

MALICIOUS

PDF

71.4 KB Created: 2021-01-26 13:13:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 7643f4e5163917fd45ff47abbc437658 SHA-1: 373286e51500458f581ece836ccdb4c979b341a3 SHA-256: 27d7e90278c311d2c9d840ad1eaa4a3caec16b15b3d9a6b133ed8a839bb678cb
154 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics as malicious, including a critical finding for a malicious redirector link. The embedded URL points to 'traffine.ru', which is known for redirecting to malicious sites, and the URL itself contains parameters suggesting a lure related to 'facebook apk mod latest'. While no scripts were explicitly extracted, the PDF structure and the malicious link strongly indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffine.ru/aws?utm_term=facebook+apk+mod+latest In PDF document text
    • https://static.s123-cdn-static.com/uploads/4381964/normal_5ffb85f4163b1.pdfIn PDF document text
    • http://paktum.pro/smith_s_pharmacy_hours_valle_verdevdp5g.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/pigarubuvr15mh.pdfIn PDF document text
    • http://fartook.online/bomasefadafalibowobei5r0.pdfIn PDF document text
    • http://mmuuue.space/ufc_fight_last_night_israelqi5uu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385635/normal_5fdd3304e12b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380854/normal_5fdf79982b5c5.pdfIn PDF document text
    • http://immortal-sho.club/scary_halloween_mazes_near_mex9wnp.pdfIn PDF document text
    • http://itfamily.info/bridge_constructor_portal_switch_reviewvuu68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388825/normal_5ffa02e6826d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413120/normal_5feb18b1717cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fogibi/android_10_gesture_navigation_back_button.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/44559010027.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/77722258563.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/shooting_star_candlestick_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/dhakad_chhora_full_movie_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/lansdale_reporter_obits.pdfIn PDF document text
    • http://rupevisa.epizy.com/scan_barcode_to_pc_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/blacklist_calls_android_app.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_off0000d063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD063 4916 bytes
SHA-256: 6a311f6ffcf94c077a2f79feccb0baff1514a8f0ec2e9de47da0db8655d7afff
font_01_sfnt_off0000e118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE118 9824 bytes
SHA-256: 6b3991c9ef477bf536be58158ec77d0a73b4193c4990977de51ab37e23e706f3
font_02_sfnt_off0001024d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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